Wow, I can only hope the linux code will somehow benefit from whatever Noodle did with the Windows code.  I've got 4x Opterons that went from 2.8947 H/s to 5.000 H/s when I moved it from Ubuntu to Windows.  My E5 box with Ubuntu is doing 5.4 H/s, but I can't swap OS's on it.  Both are VPS.