I'm also guessing Maxthon[1] has a large browser share in China and you'll notice that MSIE6 is in its userstring[2], which could possibly be diluting the results for pure IE6 instead of those with the same engine (Trident[3]).
This would certainly explain the market share of IE in general, but IE 7, 8 and 9 each support ActiveX as well, so I can't imagine that alone is a factor.
1. tons of pirated intalls that can't be upgraded and 2. botnets from China that over-represent the amount actual ie6 traffic