QUOTE(thekohser @ Sat 22nd October 2011, 2:50pm)
It seems that no consideration was made for the possibility that "avid" readers of Wikipedia are more likely to take a survey about Wikipedia than "casual" readers.
Another brilliant job in research, Wikimedia Foundation.
I found the segmentation of readers into individual groups for anything less than 5 visits per month and one lump "Avid" group for 5 or more visits to be ridiculous. I didn't see the original survey, but if those are the choices of boxes to tick, I think they wasted everyone's time.