> By and large, though, I think most people would agree that politically Wikipedia skews somewhat left of centre.

I find this type of sentence very frustrating. Left of which centre? Where is the centre? What is left and what is right? None of these questions have clear answers as soon as you look at a global userbase.

I think en-wiki reflects the attitude of the editorbase, i.e. mostly young, mostly male, mostly white, mostly anglo-saxon, mostly educated, mostly geeky