Allies in Dalaran

If you arrive off the boat from Stormwind this is the first quest you see. The low level Northrend quests are in Borean Tundra and Howling Fjord. So why go to Dalaran when you first arrive? This quest costs you 2g from Valliance Keep, and takes you away from where all the quests are. So you'll probably just end up spending 2g to fly back. Or going via Stormwind and catching the boat again! Take the trip when you are ready, not because it's the first quest you come to.

If you accept the quest and don't take the gryphon ride, you still can finish it off if you arrive at Dalaran by other means.

The old quest to get you to Dalaran doesn't kick in until level 74:
The Magical Kingdom of Dalaran: from Valliance, Wintergarde, Valgarde or Amberpine, giving you a free teleport from any of these locations to Dalaran. If you abandoned the quest when you got there, you could continue to get free teleports from any one these locations, not sure if that's still true.

Looks like a new quest added in 4.3, I'm guessing it's so players who are new to the game and are coming to Northrend for the first time can figure out where the major center of the continent is located.

This should've been called 'Friends in High Places'.