No, I think it's just people putting in a lot of hours into the game. I have a friend on my list who's an SR-32, and I'm pretty sure he's never used the double xp codes. --- Mafia vs. Irish Mob (BROTHERHOOD series) http://www.youtube.com/watch?v=4C-ogMPoBRk
im sr-29 and ive been playing a few hours a day since launch...like maybe 3-4 hours a day? not much...and without double xp either. --- Understand, Man is not a machine - he needs a surface, a purpose and a reason of being.