i don't like personally recorded demos for subtle aim toggles like this. lag between users and the server can cause some weird effects. if you could find the ticks in the sourcetv demo, i'd look at them. but from what i saw in the demo, i can't say conclusively that he's hacking. yeah there are some fishy shots, yeah his accuracy is really good, but considering the way the demo was recorded and how subtle the irregular movements are, i can't say +1. not that my vote has any real pull..just saying, try looking at the sourcetv demo and see if you still feel the same way.

editL: just read the unban thread, vac bans do change my opinion on this guy. however, sourcetv is still more reliable for demos in my book. i've seen a lot of jerky movement in spec that has nothing to do with hacking.