While I'm totally psyched to start going through new content, since I do not want to spend launch week guzzling energy drinks and playing from the toilet so I can go NON STOP, I am not too worried on missing out on a bit of rested xp.

If Cata is anything like Wrath I will probably wander around going "Ooooooh! PRETTY!" in half of the zones for at least a week before I seriously get into gear with leveling.

And, as offive said, I'll be leveling both my main team and my off-teams (and a team of Worgen Druids) I bet I'll have plenty of rested all around due to switching off.

Also: I am probably going to spend at least 80-81 on my main team leveling in the first dungeon, just so I can learn the new tricks we'll need for Cata. It should be fun!