Anecdotally I've found ReCAPTCHA's CAPTCHA easier to fill in than other CAPTCHA that do strange distortions to obfuscate perfectly rendered text. It seems the

Anecdotally I've found ReCAPTCHA's CAPTCHA easier to fill in than other CAPTCHA that do strange distortions to obfuscate perfectly rendered text. It seems the human brain is much more adept at decoding the black and white noise resolved in a crappy scan than the artificial manipulations applied by a computer algorithm. It also seems the opposite is true for computers.