And all that tells us is that we probably don't know everything about the mechanisms of genetic variation yet. This in no way strengthens any other particular hypothesis.
C-man is forced to appeal to some mystery virus.
You are appealing to incredulty to make your case. I bring up viral action as a mechanism of variation. "Mystery" is YOUR addition. Sentis is the one who originally referenced the recent work in virus-induced variation, so I am pinging him to the thread. I believe Nebullis may also be able provide some information on the topic.
Chimps and humans are genetically different. I'm saying let's try to figure out how it happened. 42 million differences? Great! First, are we sure, and second, how do we get there from here (or, how did we get here from there)? I read your posts as suggesting that a natural explanation is impossible.
The mutational burden, so to speak, of the human-chimp difference doesn't rest on the human branch alone. The chimp branch also diverged from a common ancester. So, the numbers shrink further.
Are those numbers reasonable from what we know about mutation rates in humans, today? Yes. Researchers studied the mutation rate at a number of different loci and found that these rates agree with the rates implied by the human-chimp genetic difference.