thanks for testing so far.
What drive are you testing with?
You say, that you are using Nero DriveSpeed. Maybe you really mean Nero CD Speed? They are both different utilities:
DriveSpeed is a speed setting utilitiy for Windows and DiskSpeed (formerly CD Speed) is a benchmark for measuring read rate.
I have no idea, how DriveSpeed works and how it keeps the spindle speed down. So I'd advise against using my utility together with DriveSpeed as it may lead to conflicts and unexpected behavior.
Also, I haven't tested my tool under Windows. It MAY run under 3.x/9x/Me, but I wouldn't recommend it. It's primarily meant to run under real DOS (including MS-DOS 6.22 and higher of course).
Please also keep in mind, that the speed settings are immediately lost once you reboot your PC. Maybe you should do some testing with SPEEDSYS from this page:
From my experience, it's a bit more reliable than the Nero benchmark.