I think you are thinking in terms of other MMO games, I know that the leveling may have been accelerated for the Beta but Bungie has already stated that they dont want you to feel like you have to grind to level your charecter. I am betting that by this time next week people will be raiding, how succesful they will be IDK. Its not really a matter of having no life, or not enjoying the story line, or misplaced priorities. You just have a large population of gamers that have the skill and free time to get through the game faster than you average casual gamer. I am not one of those people but I certainly don't begrudge their enthusiasm.