The plane really is nothing special, with regards to Aces High.
Because of this, it is often flown in a way that is considered timid or annoying. In the case of most pilots, a slow pony is a dead pony, there are very few that can effectively dogfight every plane in the game w/ a pony (I myself still get whooped on a regular basis by all sorts of aircraft and I've been flying the Bravo for a couple years now). People yell that it should be perked because there are so many P-51D's to be killed by.
Frankly, I'm surprised I don't see more Typhoon perk whines. A BnZ Typhoon is much more deadly than a P-51. Ponies have to keep their guns on target much longer, as their guns don't have the same "critical hit" ability that the Hizookas have. Not to mention, I hardly ever see a Typhoon enter a fight anything less than 5k above (I know there are exceptions). I've deduced that people are getting frustrated with the NUMBER of P-51's they see of whom they are unable to catch since they are BnZing.
It is not the fastest plane in the game by any means (LA7's whoop it)
It accelerates poorly
It's climb rate is average
It's sustained turning ability is mediocre at best
It's instant turn rate is actually pretty decent, but very short lived
It's firepower is average
Visibility is good
Directional stability is garbage (and because of this, any E-retention and gunnery abilities truly are thanks to the pilot)
I'm sure I've forgotten some things, but really, this plane doesn't even come close to a perk ride. If the Delta were perked, it would not only be the WORST perk ride in the game, but it would be severely outmatched by numerous non-perk rides.
If this game were played at 20k+ altitude, the Delta could be very scary (I feel that is when the laminar wing really shines). However, with the way the game is played currently, perking this aircraft would accomplish nothing but make a fairly middle-of-the-road aircraft expensive.