It is rude. You can say "I don't consider this benchmarking; benchmarking would be XXX" etc. Just to say "you failed" says more about you than this article (which does need work).
As an article it's not particularly clear in method or presentation. It's not especially clear in what it's measuring, process, isolation of variables. But it's not attempting to be a journal article. So that's not what I meant about "needs work" (though it is hard to pull the message out of the wording).
But I don't think it supports your thesis. Again, thats part of what the web is about (not every posting should be a well polished pearl) so I"m glad you posted this. If you cared though, I'd improve your process. This post might not be worth rewriting though -- that's up to you.