From the latest article at webcredible
7. Don't worry too much about accessibility statements
Many websites attempting to offer great accessibility create lengthy and what they believe to be helpful accessibility statements. Typically these pages contain information on the accessibility features of the website, how to resize the text etc.
In reality, disabled web users very rarely look at accessibility statements. As web users we don't tend to consult 'help' guides on any site - rather, we stumble along attempting to complete our goals. Although there's nothing wrong with making an accessibility statement page there's no need to spend too much time on it as it won't really be used.