I'd stick with it at this point. The reason why is your now entering the stage where it starts to get fun. I think it took me 6-7 days to reach 60 with my shams you can use that as a guide. I think once you hit hinterlands it takes off like a bat out of hell with all the zones to quest in, and all the old instances. I really enjoy the old 60 content, thats where it really sinks in that you can accomplish some stuff!

If your on a PVE server I'd start over. But on PVP i'd keep going and enjoy mowing down groups and finishing quests on their corpses.