Yes. I'm deleting ALL of my characters though. Even my 80. And I do not regret it. Here's my plans for Cataclysm.
Only use Dungeon finder when necessary (I.e. for quests and if I need gear) and when queue, I'm going to the entrance to the dungeon first.
No heirlooms.
Do as many (All if I can) quests in the zones I level in.
Level my professions on the side.
I don't want to fly through the content just using the dungeon finder or by using heirlooms. It's much more fun NOT to do that.