In both Vanilla WoW and Burning Crusade, you could usually count on having the motivation and reward for running a 5 man no matter what your level. In Vanilla WoW, you might do a tribute run for potions and buffs or a Stratholme run for Abomination stitchings for an enchant. In BC, you'd run for badges. In Wrath of the Lich King... not so much. Badges don't stretch so far since most of the good stuff requires badges only obtained in raid dungeons, and even the daily quests aren't even close to as lucrative as just heading up to the Argent Tournament or over to the Sons of Hodir and doing some dailies.