"After reading the thread containing everyone's results, I did a quick count and found that over 50% of respondents are INTJ."
Maybe all the ISTJs like myself lurk and don't respond to posts. The study up above shows that ISTJs have a higher percentage than the INTJs but I didn't see a single ISTJ in the personality test poll.
Maybe I could do a survey on the blog. That seems to bring out the lurkers.
(It could also be that people simply don't know---that INTJs are into MBTI more than many other types. For example, given the rarity in the population, there are a surprisingly large number of INTJ forums on the web.)