Parallax Abstraction wrote on Oct 7, 2011, 23:11: It's id's job to ensure that their brand new engine works properly and if that requires special driver considerations, it's their responsibility to contact NVIDIA and ATI and get that done before the game comes out. If they called these companies and said "John Carmack would like to talk to you to make sure id Tech 5 works with your cards", they'd probably have their lead drivers engineers on the phone with him instantly.
My understanding is id Software was in contact with AMD months ago and they did work things out but then AMD fucked up and didn't deliver. NVIDIA drivers work fine, even older ones. JC actually spoke somewhat about the AMD efforts during his super long sit down talk at Quakecon.
This isn't even anything new with AMD/ATI. They have some sort of total lack of interest in being aggressive with their OpenGL devel. NVIDIA owns them in the professional world because of it and occasionally we see it rear its head in gaming. It probably doesn't help that there is major upheaval over there and they seem to be slowly imploding on every front.