As Roxas stated it's all going to matter on how it's dropped, what angle, etc. etc. I have the case, the raised edges/lips on the sides really will give it some bounce, but that doesn't mean it's going to protect it. It's all situational.
Best thing to do is avoid dropping it, buy a sturdier case if you're that worried about it. No-one here can make any promises that it won't break the screen or do some damage.