These new detonators are sweet! They're lot faster in Giants and Deus Ex - the only two games which aren't fast enough already - than any of the older releases. In Deus Ex stuttering, trademark of Unreal engine, has gone down to almost glide-like level - 1024x768/32bit plays smooth. Giants still isn't very smooth (it's around 25-35FPS, 800x600/32bit full detail), but there's a really noticeable worst-case performance boost. Furthermore, FSAA is now faster (Q3 playable at 640x480/32bit w/ 4-sample FSAA) and color saturation looks to have been tweaked.
I recommend everyone to give a try. I've encountered no crashes or anomalies yet.