And if the power was what was actually shown on the dyno at 175hp ?Take an awful lot of runway to get off the ground, even at SL on a standard day, assuming it could do so, and then climb like crap and fly slowly.
But I have about 100 ft^2 of wing, and the Raptor has a lot more, so the wing loading is approximately the same. And I have a 180 HP engine, so at 2175 lb (MY MGW) I've got a power loading of 12 lb/HP. The Raptor, at 3600 lb and say, 250 HP (what folks here seem to be estimating it has for actual output) is 14.4 lb/HP - not substantially lower. And if he is actually getting 275 - 300 HP, then the power loading is essentially the same as the COZY MKIV.
So I'd expect the performance, based on just these two ratios, to be vaguely similar to the COZY MKIV for takeoff roll, rotation speed and climb rate. But these are gross estimates, just to get in the ballpark. It's impossible to say what's actually going on here from the paucity of information that we actually have.