http://www.bit-tech.net/gaming/2007/08/30/bioshock_gameplay_graphics_and_performance/8
As gamespot already reported, HD2900 XT is able to overtake GTX and Ultra in DX9 mode (however GTX/Ultra have slighty higher min fps). So, we can call it as a tie. In DX10 mode, HD2900 XT performance terribly drops. It's not clear if it's Catalyst driver bug, or HD 2900 XT hasn't enough power to handle DX10. Anyway, Firingsquad tests were talking true.
As gamespot already reported, HD2900 XT is able to overtake GTX and Ultra in DX9 mode (however GTX/Ultra have slighty higher min fps). So, we can call it as a tie. In DX10 mode, HD2900 XT performance terribly drops. It's not clear if it's Catalyst driver bug, or HD 2900 XT hasn't enough power to handle DX10. Anyway, Firingsquad tests were talking true.