Meh, ATi used to cheat, they turned out ok (although recent Catalyst drivers are starting to become poor again).
I prefer to look at what they doing for each product and pronounce judgement that way.
Under that, I would never buy a nv3x card (except the 5700U or 5900XT) and I'd never get a NF3-150.
I would, however, trust the NF2U400 since it's proven to be good.
Moreover, when I get a new system this christmas (hopefully) I'll have had more than 6 months to compare the nv4x and the r4xx. We'll see if nVidia cleans up their act and produces a competitive GFX card.