Umm. Q3, if done well would lower the framerate, besides Jitspoe has done something great here, this game has gfx equivalent to Q3...pk3's are overrated, bsp's for Q2 are about equal. Q3 is loaded with hacks too. Could you get Punkbuster compatible with DP? I think so, but it's still not great.
And umm...Q4 code is out? Haha, not unless you're a reverse engineer.