So who is going to be the first volunteer to do a scratch test?

I sure as heck won't be. The screen material is the same as the Incredible though, and there's a video demonstrating that. I don't trust these videos though. Both my Motorola Droid and Incredible had tiny little scratches that only my OCD eyes could see, and I think they are caused by smaller particles that get inside cases, pouches, and pockets vs. taking a set of keys to it.
 
unless the built quality of the incredible is total poop, he had a screen cover on that phone. Look at the lower right side edges and there are very obviously some "air" spots.
 
Don't have to worry about scratches here... installed my Bodyguardz screen protector last night. That coupled with the HTC silicone skin, I'm covered as far as scratches go. The bodyguardz doesn't show fingerprints either which is another huge plus after using the phone naked for 1 day. It's definitely a fingerprint magnet without a screen protector.