You misunderstood what they meant. The games are written backwards. As in data is written on the outside and then inward. Where as normal cd's are written from the inside outward. This change does not effect the way the disc spins at all. That remains the same. It just messes up drives because for example the TOC is suppost to be in the few couple of bits of a DVD. I don't know the exact numbers of bits but since it's written backwards that means it's looking in the wrong spot and never finds it, thus the computer fails to read it.
As for reading xbox disc's on a PC it is possible and a few have done it but it's really not worth the effort. In order to do it you need to change the firmware on your DVD drive and if you mess it up you'll destroy the DVD drive. So I mean really, why take the risk since you can just do it off the xbox and it works just as fast if you have 100baseT network home network, whcih most people do.
Also the only drives with rewritten firmware to accomplish this are samsung and only 2 or three models are supported (Or well I should say 2 or three models have rewritten firmware, nobody actually offers support
) So if you have anything other then one of those models you'd have to rewrite the firmware yourself. In effect every drive needs it's own special firmware. Of course once you do get it you can easily use programs like nero or alcohol 120% to copy xbox DVD's.