Yeah, personally I am inclined to believe he probably is because of the confidence and wisdom he conveys in his talks that I have listened to online. I know that confidence is not a sign of enlightnment in itself and wisdom (or at least the appearance of wisdom) can be borrowed. So, I don't really have enough criteria to go by, but he appears to me as "knowing (from experience) what he's talking about".
Four types of letting go:
1) Giving; expecting nothing back in return
2) Throwing things away
3) Contentment; wanting to be here, not wanting to be anywhere else
4) "Teflon Mind"; having a mind which doesn't accumulate things
- Ajahn Brahm