From what I gathered from the German forums it is not worth it. Even putting 5 points in it off the bat, you may or may not gain an extra level by the end of the game... an extra level that gives 1 or if you're lucky 2 skillpoints.
I know that a level is more than skillpoints, still investing several skillpoints in the start of the game when you sorely need them to get one or two skillpoints in the end (if you're lucky) is not worth it IMO.