First off, thanks to Edge540 for attesting to my corporeal existence and modicum of paddling experience. I'm guessing from your commentary that you are someone in Seattle I know from the sprint club at green lake. Aasim, Juraj, Ludo, Eric, Don, Karol, Doug perhaps?
The Jantex Alpha, is IMHO, Jantex's version of the GUT design and the Gut is also a very well made paddle, at least as nice as Jantex. Ken Wallace used this paddle for years (he may still) so at least broaden your search to include the Gut as well (only one design 3 sizes) if you are curious re. parallel blades.
The lettmann nordic/fenn 1/gara? that hank mcgregor uses is the other (slightly different) parallel design worth mentioning. looks like you might audition one of these. Don't be concerned if the paddle is a couple cm longer than what you are used to now cause the lettmann style blade is longer that most teardrop blades and the shaft length (which is what IMHO should stay consistent) is likely about the same.
The only thing I do differently w/ a parallel blade than a teardrop technique-wise is to drive downward a bit more at the catch (spearing the fish) which I find to be less necessary with a teardop. The trick is to do this with whole torso not just arm reach. I'm a bit more patient for the pressure to build on the blade before really applying max power, and then lastly, have to remind myself to attenuate the stroke at my hip at the end of the stroke. I don't really consider how widely the blade flies from the boat mid-stroke. I think the (closer to the boat) commentary on parallel blades is just a function of the fact that the first 1/3 of the stroke is relatively more downward and does not immediately track away from the boat until a bit later in the stroke. (although it also generates lift with this downward motion) This will be apparent or come naturally with a bit of time spent with these designs.
Beluge to clarify my apparently contradictory statements about the Gamma. When is said it is like a Euro blade in some repects, what I meant was that, like a flat blade (assuming a clean catch) the purchase in the water correlates to the level of exertion on the paddle and cadence. Put it this way, A big parallel wing (for example), provides the same leverage in the water per stroke whether the stroke rate is high or low, or whether boat speed is fast or slow. It basically has one threshold level of power delivery that is available. Same power available for every stroke, fast or slow.
With a flat blade, and for argument's sake the Gamma, (and to some extent all smaller blades) the blade doesn't have much power if it's moving slowly through the water, or if the rate is low. Under acceleration associated with vigorous (read hi-RPM) paddling, the blade finally "hooks up" or gains traction in the water and suddenly provides purchase that simply was not there at low speeds. I've seen people try a Gamma at marathon speeds and say they felt underpowered. Then I tell them to do a full-on 200m sprint and they can't even accommodate the additional bite the blade has in the water. It's like a Jeckyll and Hyde paddle whose power is only fully there when the paddler places demands on the paddle in the form of exertion.
This is of course true to a certain extent with ALL paddles, but to an astonishing extent with the Gamma. I think in theoretical terms this has to do with the "apparent wind" (for you sailors) that the blade sees in the form of more relative velocity of the blade through the water. Much like a foil kite can generate lift (once airborne) without any wind at all, if it is flown aggressively through the window and always encountering APPARENT WIND. for this reason the paddle always seems to be encouraging you to increase the cadence, which can be a good or bad thing, but is more taxing aerobically than a more deliberate stroke at lower rpm.
Given that it doesn't provide much structure/stability throughout the stroke, then how could it be good in the rough or forgiving? seems
contradictory......
Well one thing is true of the Gamma, it is more tolerant of sloppiness at the catch when tired than parallel or teardrop blades. Wildwater racers use med Gamma at about 200-205 and every other stroke is less than laminar or optimal and somehow the blade manages a adequate catch. I think the wide blade works in aerated water where a wing shape can't really generate lift and the larger, flatter, surface area mid-blade creates power in drag mode
nonetheless. Some wings much prefer an exact, repeatable stroke and laminar catch typical of a sprint race or else they just don't work consistently. (B6 and warp come to mind)
Also, as long as the stroke mechanics are sound, the exit is smooth and without surprise.
Lastly, I have a theory that some people like the Gamma for no other reason than the fact that the effective cant of the blade is much less than most other blades. There is some cant, but the almost immediate severe twist on the leading edge brings it back to just shy of being on-axis with the shaft. Not sure what effect this has on the performance of the blade, but it definitely makes rudder strokes and low braces using the back face of the blade more intuitive and more immediately effective on a downwinder, as well as a few other complementary braces/draws. Moreover this lessened cant makes the paddle feels more balanced in the hands. (blades with alot of cant are balanced on the shaft such that they want to roll forward in the hands into a open attitude at rest) Gamma feels more neutrally balanced in this regard. Also, on those occasions when you have to react quickly (breaking wave, hi-centered between wave peaks, surprise wind gusts, etc). The Gamma does not hang up in the water and can release on demand to take one of those surprise half-quasi strokes that occasionally save your ass.