IMHO, and for the most part, all that "D" braced longbows have for me is an aesthetic look (which is a really good thing), but they can't compare to a hybrid in terms of pure speed - and for me, the speedier I can get a heavy arra out to 15-25 yards the better.
There are more that a few "stealth" hybrids around that are snaky when unbraced, yet form a classic "D" when braced. These kinda bows are definitely faster than the "Hill style" classic straight or reflex limbed longbows.
These dayze, gimme a hybrid longbow, for the best of both worlds (longbows 'n' recurves). Aesthetics is a wonderful thing, but when hunting I want that killing speed. I was just shooting my little 60"/50# Thunderstick MOAB - man, that bow is as FAST as any like size/weight recurve, and plenty of longbow stability built in to boot.