For starters... I sent him this message:

Do you mind if I start a type thread about you? Most of the time I don't bother to ask, but like I said, it would be easy for people to accuse me of starting it for purposes of manipulation. (Honestly, I think those people just like having things to bitch about. Most people like the attention when someone else starts a thread about them.)
He told me to go ahead.

Now, I've already surveyed Delta via PM, asking if they think he's Delta, and these were the responses (I'll update as more responses come in):

Not Delta or think another type/quadra seems more likely (Alpha and Beta specifically): 7

No clue/I don't know: 2

Delta/INFj seem more likely than not OR "I don't have a problem with INFj": 3

Let's vote.