According to
wow gold he completed level 58 to 59 in 5 hours and 33 minutes.
I leveled my
wow gold Troll Priest in 6 hours and 34 minutes and took various screenshots to prove it Considering it is the first time I have leveled a character this high (next highest is a level 39 Alliance Night Elf Druid) and I have to keep looking at the guide (online since my printer is broken) to see what to do next (will be easier/faster next time wow gold) and occasionally check.