In the BoF the other night the issue of testing accessibility was raised, I thought this was very interesting and we certainly need to move forward form the ad-hoc methods we used in Drupal 7 development and I think formalize our testing procedures and methods.
Examples include standardizing on software used in testing, for example a defined list of AT such as screen-readers and versions.
We certainly need to raise our game with regards to user testing also, perhaps looking to arrange defined rounds of end user testing at various points during development.
Finally we I think we can partner or collaborate with third parties on testing - such as large organizations outside of Drupal with a vested interest in Drupal 8's accessibility standards.
