It's not. If it did, cpu benchmarks would have shown that.
See the early posts in this topic by me, where I did cpu benchmarks with this "overclock" and an actual real live overclocking app.
http://forum.ppcgeeks.com/showpost.p...7&postcount=32 (that's the post)
I have no idea what this is doing - it's doing something... just not doing anything to the cpu clock.