Looking at the SYSMark results under Windows 98 the 2% gain given by super bypass doesn't seem to be much. However, if you compare the difference to going from 750 MHz to 800 MHz you'll see that super bypass gives you almost a half a speed grade.

Business Application Performance Under Windows NT

Windows NT on the other seems to enjoy the benefit of super bypass. A 5% gain is achieved. This is pretty impressive given that there is only a 4% gain from going from 750 MHz to 800 MHz. Super bypass is giving us a free speed grade in performance.