Now with the iPhone 4 officially released, the people over at iFixYouri Have repeated their drop test to test the iPhone 4 glass. Really, it may be stronger to hold up to daily finger usage, however it appears that with just a few drops, the glass will shatter.
I know I, as well as many others, were hoping for a harder plastic surface which could withstand more abuse. It appears with Apple's design to expose the edge of the glass, that more damage could be done, than if the glass edging was protected more. More tests I'm sure will be done to the phones, and more solid conclusions will follow.