No Captcha is truly Accessible is the constant feedback. But looking at reCaptcha V 2.0 where Google actually throws up images/audio only when, on mouse actions it detects that the it is not a user and Also the image option has an audio captcha option, I thought that Google reCaptcha was an accessible solution.
How do we validate it is WCAG compliant? Any documentation to say reCAPTCHA Version 2.0 is WCAG compliant? There is a note on the reCAPTCHA home page which talks about Accessibility, but there is no direct compliance indicated!