when is comment spam not spam?

Take a look at the first comment on this posting. It starts like comment spam and is as vague as comment spam and like comment spam actually doesn't relate really well to the topic. So my question is whether this is some kind of experiment by c-spammers trying to get round the system of visual confirmation to post which has been, so far, successful in stopping automated comment spam dead. Anyone else been getting random bonhommie in their comments?
Oh, and the final sus thing is that if you click on the poster's link, it's a defunct account.
Nouslife: Right questions and wrong questions