I'm not sure if the devs have spoken on this topic yet but I really hope that the level cap takes a while like it did with both the original EQ/EQ2 when it first launched. I'm so tired of playing games that allow me to achieve reach level 30 in one or two days and max level in less than a week. I want to be able to feel like the levels are an achievement even if the game feels a bit more grindey (I think grinding can be fun in groups). When I hit level cap I want to look back and remember zones and the mobs in the them like I did with EQ/EQ2. The benefit of a longer leveling curve is the ability to spend more time in zones and therefore more time soaking in the lore and building a connection with the world and the people in it. Call me crazy but I would even welcome hell levels over EZmode MMORPGs that are a dime a dozen nowadays.
I think level cap should take roughly 3 months when playing 4 to 5 hours a day.
I'm curious what others think, post below!