#7 - June 9, 2009, 5:21 p.m.
It's important to remember that, while partied, a mob's total experience value is split between all party members. So, if a mob is normally worth 100 experience, you'd only receive 150 experience in total while partied with an RAF partner (100/2 * 3).
The effect of triple experience can be really be felt at later levels, though, and during quest turn ins. :)