@Darrin
FastATA will naturally be faster than the onboard IDE as it's Z3, and isn't build like the other IDE controllers released.
Comparing it to the onboard IDE controller or any Zorro II based controller doesn't show the correct picture. It will be like comparing the FastATA to the CSPPC SCSI controller.
There is no speed gain on a Buddha compared to the onboard IDE controller. If any speed increase, it's only minimal.