It's the same with Canon straps. I didn't even know the model number was on them until someone came over and asked how I liked my 50D a couple years ago. I couldn't figure out how he knew from that distance until I looked at my strap.
I'm pretty sure my 30D and 10D didn't have it advertised.
I can't stand the stock straps that come with the cameras, my D300 has a Crumpler Industry Desgrace strap, as does my F4. The rest have various other 3rd party straps.