yes i agree that's the basic jist...mind you i haven't had any problem diving them myself.. !! roll em over down they go..
the only difficulty is in getting the nose down from straight and level flight. (but i can live with that)..once the nose is down tho they dive like anvils which is what the link refers to i think..they weren't overly nose heavy ,it's more a question of momentum once diving that makes the engine weight an advantage (given you don't rip the wings off or course!)...all in all i like the added difficulty given by this approach...it hands the AI a huge advantage and balances the gameplay out enourmously..i'm allways getting left in the dust by the AI and having to reposition and attack from a new postion...had some dogfights last half an hour!!! great fun..