In a way i was shocked... but it is mainly for their network here in the US. Most people will be signing up with T-Mobile... so they have to mark their spot. I just want those dual chips, so we can have GSM/CDMA/LTE in one phone. That would be epic.
I was just in my local Best Buy and the demo Nexus S they had on display did in fact show "Downloads" and was NOT carrier branded.
However, this particular unit was also not registered on the T-Mobile network but was connected to AT&T because it had Cingular APN settings. I tried to register it on T-Mobile so i could compare signal strength with my G2 and it failed every time i tried to register it.
This particular Best Buy also doesn't sell T-Mobile phones so that might have something to do with why that demo unit couldn't register onto T-Mobile.
Be curious if there's ever an official statement or anything about it.
I wonder, though, are there two SKUs for the Nexus S? I know it's supposed to be the same phone either way, but maybe there's one part number for the one that's purchased outright and another one for the one on a T-Mobile contract?
Perhaps the outright purchased SKU doesn't have the branding?