i don't get it either. i just mudged my client side rates (thanks to strange's plagerized) post over here. you may need an abacus to do the math, but shizam, it works. a lot easier than getting a straight tickrate answer from barry @ xgs, or valve, or anyone else for that matter.
also, that video was dope. i'm pretty convinced that kid sat up a few nights thinking "i wonder how it would look to have a bot jump over me, shoot him in the head, and all in slow motion? better yet, lets have a perfect circle rock out in the background." i dunno if the problem is as exaggerated as the video makes it (what were his rates, btw), but worth turning the speakers up for.