Perhaps semi-recent skill up rate adjustments and food can be a factor, but I'm not at all inclined to believe gaining 150+ levels in 5 hours would be the norm. Hell, recently capping off H2H and GKT with 30+ levels on each took about that long per weapon with double march, haste, haste samba, capped gear haste, and hasso on SAM while wielding Soboro against birds in Mis with Martial Master up. Pretty much constant fighting.

Either way, we'll all be reminded in a few weeks. x.x