didnt say it was impossible to drift with an engine in the boot, its just harder and takes alot of skill to do it, gaz the nsx u saw was prob driven by kiki nana, he is the only person i have ever seen drift one propperly...
rear mounted engines or mid mount that is close to the rear wheels are hard to drift as they carry so much inertia in to the corners, when you come back for a transition you get alot of weight swing back behind you and it snaps, like in that vid loony posted watch the driver transition he does it slowly, compare that to a s body or ae86 and they propper chuck it side to side fast...