While "doing cf" my squat 200->300, deadlift 315->450, couldn't do a pull-up at all -> 18 dead hang, never done Olympic lifts before -> snatch 192, clean and jerk 242, 7 minute mile -> 5:22 mile. I'm not a super strong dude but I can definitively say I've gotten stronger doing cf.
I like this post. Not that I think crossfit is ideal personally, but I'm glad to hear success stories.