I think you put that well, actually (although the editor base is not as young as it used to be ... quite a lot of oldies by now). I would agree with your phrasi

I think you put that well, actually (although the editor base is not as young as it used to be ... quite a lot of oldies by now). I would agree with your phrasing. What I meant with left of centre was that, taking the US as an example, Obama and the Clintons (lots of Wikimedia consultants have Clinton links, actually) are more likely to get favourable write-ups on Wikipedia than Republicans.