Compared to a few years ago things got a lot better, and in dx11 the differences are small (we’re talking reliability, performance for money AMD/ATI has always done very well), I do still routinely hear of glitches with AMD cards which are almost unheard of with nVIDIA cards (especially classic viewport, transparency drawing and so on).
I think a lot of the stereotype is an old reputation they aren’t quite able to shake off when it comes to 3D DCC with Autodesk products, things are better, but they don’t seem 100% reliable all the time yet.
Personally I’m hoping AMD will do well, but am not buying yet. Even if I didn’t have an investment in CUDA development (and I do), I would probably still have bought a Titan. A GTX 580 can be had really cheap and still does well with Maya if you’re on a 250-350 budget.
This is mostly hearsay though, I haven’t owned an AMD in quite a while, and the last time I benched one before purchasing was at least a couple years ago (when it still had the horrible selection lag issue which, from what I hear, is gone now).