I also submit that HWBot is not a good source. I don't use them at all, neither to submit or look anything up. Their website's layout is virtually unusable. I don't think I'm alone in this opinion.

I also disagree that the first run of Q6600s averaged 3.6GHz. Most seemed to do low 3GHz numbers reliably, but 3.6GHz was pretty much a cherry picking event back then. Now, 3.4-3.6 is pretty common. Higher (at sane voltages that won't kill it within a year) is still not normal.