For me it was relatively instantaneous - in an interval of under an hour, I went from never having heard of WikiTree (and not knowing how to spell genealogy) to Wiki Genealogist.
I have been a member for 4 months, so this is pretty fresh in my mind. Before anyone comments on the obscene number of points I have amassed, that happened only because of how little I knew and my lack of shyness to ask lots and lots and lots of questions.