The springs and pivots will absorb some of the initial attack when the string is struck, having the bridge resting on solid wood will negate this to some extent. When I had strat I always had 5 springs in with the claw screwed right back, it also rarely went out of tune. When a vibrato bridge is decked it will more or less give the same qualities as a hardtail.
Yeah, my other strat has had its bridge tilted right back ever since I've owned it, save for a couple of times I've tried it with a barely floating bridge. The difference is there, this is just the first time I've gone and actually analyzed a bit, 'why?'.
-Zaned