I dont know I think the exp is going to be the same unless they are going to add a lot more quests or something because without rested exp just doing the quests you get through the zones before you are high enough. Im only 64 but without rested exp I would still be 63 and on my way to nagrand (the 4th zone). Exp seems to work out pretty well right now with almost the right amount of quests. Some people can get a lvl 60 guy in 5 days played time, so Im sure some people can do that with 60-70 as they have in beta.