I updated my post below. Please read.
FYI, "below" is relative, it would depend on your forum settings.
On topic: although I don't RP, I am on an RP server, and have friends who do, so I support more features for them. However, that's where it should end, there should not be any boosts to stats gained from participating in RP.
(also, RP elements are a tough sell, development-wise, as it only affects 1/3 or so of the servers, and even then, not every person on the server)