According to a friend of mine, it should take about 7 hrs to get from one level to the next just questing. It will take longer or shorter based on how you play, drops, and if you dungeon crawl or not. Took me about a day and a half to get to 71 questing. Mostly by myself. But I also took time to farm up some leather, help my friends who were a little behind me, took several breaks......I kind of feel sorry for the people that power level through the game. I don't see how they have time to actually enjoy the game. Then they're stuck waiting and complaining because there isn't anyone they can run with for the raids and what not.

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"BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Will he offer me his mouth? BOY: Yes. GIRL: Will he offer me his teeth? BOY: Yes. GIRL: Will he offer me his jaws? BOY: Yes. GIRL: Will he offer me his hunger? BOY: Yes. GIRL: Again, will he offer me his hunger? BOY: Yes! GIRL: Yes. BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Yes. BOY: I bet you say that to all the boys!" -Meatloaf