Excellent question.
I'm not sure how reputation is accrued.
I seem to have stalled a little at 66, but then I only post once or twice a week, while he posts up to ten times a day.
I heard that being upvoted by a high rep individual gives more of a boost, or perhaps that only upvotes from those with higher rep than you actually count.
It hasn't really been on my radar tbh.
If he's beaten papa-pepper, then its a broken metric anyway :)