John Carmack Would Not Jump on DirectX 10
 

John Carmack, the lead programmer of id Software and the man behind popular Doom and Quake titles, said he would not like to jump to DirectX 10 hardware, but would rather concentrate on his primary development platform – the Xbox 360 game console.

“Personally, I wouldn’t jump at something like DX10 right now. I would let things settle out a little bit and wait until there’s a really strong need for it,” Mr. Carmack said

http://www.xbitlabs.com/news/video/d...115233110.html

DX10 = Vista = crappy openGL performance = unhappy Carmack...