There are many reasons why people don’t finish what they start: lack of drive, lack of time, lack of ability, etc. He discovered that by forcing himself to get away from people (not a natural thing for an extrovert) he was able to be much more productive.

Interesting. If true (if it's not just confirmation bias), then it's an example of how something like MBTI can truly be helpful. My dad was a bit of a loner, so his reasons for not finishing project were different ones. So I see how recognizing the reasons for this sort of thing can be helpful in some cases.

Then again, it's just one testimonial.

Okay, okay, I've exceeded my quota for skepdic.com links, I'll stop now.