Well, not all - see this poll:
http://www.ootpdevelopments.com/boar...e-can-get.html
Anyway even if that was all people who post here it may be very well biased. Let's say that supporters of fictional are more active or mostly know and like OOTP so they naturally found this forums. The result would be skewed by this. It's the same as for example elections - it's natural that different candidates have different support in different provinces.