Lucky donk or Shark? (Stud hi)

[Red_Diamond]

There is a player who I have been watching for some time. I've always labeled him as a donk as raising doesn't seem to deter him from playing his hands. However, I'm starting to wonder if maybe I've underestimated this person. Here are the stats:

1,468 total hands
46.46% vpip
+13.70 BB/100

I would assume that is far too high a winning statistic for someone this loose, and that it's just a long stretch of good luck? I have to admit, my old notes on him still say donkey, yet when a player continues to win at such an alarming rate... I get very puzzled.

Maybe I should come back when I have 10K on him...