Set 1 (4 toons - questing + boosting) -- 1-60 in 2.5 days /played
Set 2 (4 toons - questing) -- 1-60 in 1.75 days /played
Set 3 (4 toons - questing) -- 1-60 in 1.33 days /played
Set 4 (2 toons - questing) -- 1-20 in 4 hours /played

I spent some time buying quest turnins in the AH as well.