While I understand Scott needs to perhaps alter the text of the main document to reflect a statistical accuracy of the population on his board -- I hope the main site's description of Birks doesn't get watered down too much, for this reason:
It seems that people either love Birks or hate Birks. I haven't read any wishy-washy middle-of-the-roaders that I can remember. The conclusion I would draw is that Birks absolutely positively work for a segment of the population -- and that for others, they absolutely don't work and in fact cause pain. This seems to be black and white -- and very few other remedies discussed on this board are so black and white and definite. Certainly not New Balance shoes or cortisone shots or acupuncture or dietary changes.
Admittedly, I am a Birk lover so I am a bit biased. But -- what I find significant is not whether we represent 20% or 30% or 40% of the population. What I find significant is that Birk devotees swear by the shoes, abandon all other shoes and prepare to spend their lives in Birks, and happily so. I myself am in that boat -- with a closet full of all kinds of shoes, heading soon for the donation pile. I no longer care what the shoes (Birks) look like or cost -- I care that they have improved my PF and made my feet feel better.
Personally, I think it's the whole-hearted dedication of Birk wearers that is interesting, more so than the percentage of the population we reflect.