well, now that I got your attention ... the 4.8Ghz on air can be ritch if you turn off the diode that protect the CPU ... it is just running at 120 celcius ... If you can't turn it off, well, your thermal Diode will "save" the CPU and stop you from doing it, and make the processor throttle.
What I am trying to get everybody to understand, a full disclosure is required when you do a Manufacturer demo, because so many tricks can be used, it is too easy to play with.
Just by changing 1 Byte, i got 800Mhz ... hummmm
I think every body got the point now ... it is easy to claim Mhz ...