Level 80 Boosting

[Moorea]

As for using a lvl 80, it won't change the xp at all. You won't get any less xp but it should go faster with better stat, spells, and gear.

Are you sure about that ? I remember I did a few boosting experiments with various toons level 66-73 and I'm pretty sure the xp was lower the higher was the booster
(turned out my prot pally at 66 was actually not only more xp but faster as a booster than my then 73 DK)