Normally I don't get involved in this kind of stuff but here goes
1) It's legitimate, not doctored, and the earned/received amounts are accurate
2) The registration date listed in the forum profile is just the first date that the user accessed the forums. Especially for older members, this date is often much newer than the true registration date.
3) You don't have to spend a ridiculous amount of time, or make a lot of forum posts, to earn a lot with referrals. You just have to be able to send a lot of traffic.
4) The reason his "offers completed" count is so high, is that each referral bonus is counted as a "completion"
Hope this clears it up... and maybe now someone will try to challenge that number