The coating does not somehow make the glass itself more prone to scratching so if the 3gs where be be more prone to scratching (not that i think this is the case) then it would be the coating itself that is being scratched. A thin coating is much easier to remove than buffing glass down to remove a scratch.
What part of that didn't you understand?
Yes yes, the coating itself gets scratched, I get it, BUT IT´S PART OF THE FREAKING PHONE! It´s not like you can just take it off, when it´s been scratched and then live happily with the (3G) glass that was beneath it.
Now check this example out:
They replaced my 3G S this morning at the Apple store because the coating was rubbing off in the middle and across the bottom. I have a screen protector on it now but I always hated using them before.
In this case if there wasn´t the oleophobic coating, this person wouldn´t have had to go return the 3GS and ask for a new one.
And it´s kinda ridiculous that now we have more need to use 3rd party screen protectors or then just to treat the 3GS with golden gloves, when with 3G we didn´t have to (at least not that much). Phones are meant to be used not babied, so they have to be ROBUST!
I like you.
Scary.