I'm amazed that the post is still there. It was such a blatant, affiliate promotion. As you note, the numbers were hardly sufficient to make any judgments from and what judgments they made seemed to be pulled from their butts. A quick scan of most other WordPress forums, like the LinkedIn WordPress forum hosted by your buddy Matt, and you'll find better numbers, statistics and opinions then they were able to gather. I'm just guessing, but I'd say these guys never took a statistics course. In fact, it's likely algebra wasn't their strong suit either.