I don't believe this. Mine scratched to rat **** in only a couple of months. The glass scratches so easily. My iPhone camera died and received a replacement. Since then I have kept a screen protector on it. I replace it every 3 months.
Before you go out and buy another screen shield, why don you just try one week of nothing on the screen. I guarantee you that unless you're heaps rough with it, it won't get any scratches.
That's what I basically did, I gave my new touch a trial period with no screen shield, over a month later and my screen is still as scratch-free as the day I got it.
The glass doesn't scratch at all. Under normal usage. I had my 1G iPod touch naked (no case, no screen protector) for over 1 year. It was completely scratch-free.