D&D is yogurt with with some chopped nuts tossed in compared to Gurps (and yes, I', still a dedicated Gurps player/GM). That said, once I discovered how Aspects worked and how they're tagged, it was rather like the Disad system from Gurps (albeit with fewer situational modifiers, what with all Aspect tags a +2).
Crunchy to me is how well a player can "tag" the rules to make it work to his benefit. DFRPG/FATE forces a player out of crunchy mode into a more narrative mode out of necessity--and that's not a bad thing.