[blackZbandit]

It's basically like hat myth about soldiers marching across the bridge. The soldiers marching wound up matching the frequency of the bridge's natural resonance which amplified it and caused it to collapse. This was tested on mythbusters and though they couldn't prove it, due to the results of their small-scale tests they did call it plausible. We can also take Nikolai Tesla's earthquake machine which was designed to collapse buildings but machting and amplifying their natural resonance frequency, which they also tested and found to be plausible. Now apply this same principle to a much smaller "structure" like a rear-suspension setup and you can see where it can cause havoc. If the resonance frequency between the 2 axles are not consistent it is much more difficult for one to affect the other resulting in reduced chances of wheel hop.

I'm sure it's much more complicated than that, but that's my take on the basic principle behind the wheel-hop solution.