I've always had a bad feeling about those folks, including the marketing hype about their "ultimate"defrag. Cash to "reveal secret information"? Christ. I don't think it's the DisableLastAccess thing though (which is nice!), since that didn't "use to degrade performance".
Perhaps they're going to tell you to turn off DMA and set the drive to PIO mode? *laugh*. Or perhaps it's LargeSystemCache, which is pretty decent, but has nothing to do with CPU speed and everything to do with RAM.
But then again, neither of those are "NTFS features".
EDIT: oh wait, processor speed. NTFS compression? It does reduce the amount of I/O done, and is pretty cheap processor-wise these days.