Some things never change, and one of them is the ridiculous pronouncements of PR departments which don't have anything new or valuable to offer the world, and are reduced to touting magic software.
It is always going to make a massive difference to your performance, and the claimed improvement is always preceeded by that key phrase "up to" (which is marketing-speak for "nothing like"). It is always a major technological breakthrough, and in a way it is, as it always turns out to be yet another different and inventive way to write deeply misleading and deceptive words on the cover of a floppy disc (or CD-ROM, or download site, as the case may be) which always contains nothing more than a grandly-titled disc cache, of varying stability and reliability characteristics and entirely unexceptional performance.
Remember the "100X CD-ROM drive"? (An ordinary 32x drive of no more than average build quality, with a black magic floppy disc. We always liked them as you could reformat the floppy disc and store something useful on it.)
Remember the "Intel Application Accellerator"? (An ordinary IDE driver of conspicuous instability and unexceptional performance. In general, Intel chipset systems work best if you leave it out.)
I'd rather spend my time and money on something that is more likely to produce measurable real-world results. Excuse me, I have to go now. I need to shoot off a couple of emails so I can get hold of some of that magic lubricant I read about which will make her Gasp and Beg for More. Oh, and the other one, mustn't forget that: it's stuff that will make your penis two inches longer in 30 days or your money back. Onj the whole, they seem like safer investments.
Gahhhh....