My impression is that McAfee is a brilliant fraud, trying his best to communicate something he feels is of great value but constantly tripped up by some innate compulsion to embellish. On the other hand, he's one of the most articulate and lucid characters in the thread. While there are a few other mentally intact and highly intelligent posters, I picture him as the hapless 35-year-old sixth-grader in Miss Mandible's classroom: http://www.coldbacon.com/writing/barthelme-mandible.html
Is it more of a surprise that he's comes across as genuine, fully coherent, and rational, or that most of those consuming drugs made in their kitchen based on questionable mail-order supplies and loose online descriptions have to be reminded several times that baking powder is not the same as baking soda? My other main impression is that many of the journalists attempting to summarize the thread in various online venues share the reading comprehension level of the latter.