I had an RF Engineer take a look at the patents over the weekend. I am glad you brought this up. Take a quick read.
His Response: Interesting stuff. Their magic is to higher bandwidth speeds is the way they reduce the distortion during the frequency multiplying. In general if you multiply a frequency with distortion you increase the amount of distortion with the new higher frequency. They need the higher frequency because they need to cover a wider range of frequencies for this faster signal. You increase the speed your emission is wider bandwith. There is no available bandwidth in the current 2.4Ghz range. Their signal would be to wide for the current allocated frequency range. That's why they have to go up higher in freq where nobody hangs out.
The problem appears to be, in order to multiply a lower freq to a higher freq your adding more distortion. So now you got this new freq in a new RF band all to yourself so you can be as wide as needed but the quality of the emission sucks cause it's loaded with distortion and that ended up throttling back the speed until you get a good signal which defeats what you wanted to do!! Mo Fo! Their description claims they have solved that problem.