i actually gained some memory, it seems like about .7 gb.
as for the actual update, i think its pretty neat. i like the slide from the bottom thingy better than i liked the double-click home thing for music playback and stuff. the flashlight is also pretty cool, that allowed me to delete the flashlight app and free up some space.
overall, i wouldn't really worry if you're having troubles now. its a pretty awesome update but you wouldn't be missing out on anything groundbreaking if you wait a couple hours, or days or whatever.