I dunno about all this talk of rushing it..
During alpha (who knows what'll happen during launch), I did all the storyline quest and every single side quest
(This includes race quests in other starting towns) uptil about 35. Not to mention I did do quite a few trade class quests, did dungeons, farmed for hours, collected nodes for fashion and crafting for hours, and explored all over xD
I leveled up pretttyyyy fast, one of the few people that even got that far in alpha 1+2. I enjoyed myself a lot and on release the one thing I'll probably change is that I'll dungeon more (I'll get even more exp then I did in alpha, but I'm not doing it for exp), and I'll craft more.
Now if you call that rushing since I did get pretty high pretty fast... Well.. I'm gonna rush it again cause it was tons of fun xD
There's almost no grind so you don't have to be hardcore to enjoy yourself and get up there fairly quickly