I was listening to an older WebDev podcast, in which they were interviewing the head of Accessibility.net. In the interview he stated that an accessible site can increase SEO by up to 70%. He also mentioned that in some studies 80-90% of sites are not accessible.
Both of these numbers struck me as being very high. Can anyone help to explain why they would be so high if standards are improving ?
I will also be sure to go through the links in the sticky.