True, the discussion is more about captchas in general. The study isn't bad, I read through it and it's interesting to see real numbers on how long it takes use

True, the discussion is more about captchas in general. The study isn't bad, I read through it and it's interesting to see real numbers on how long it takes users to solve various captchas. However, a more appropriate title would have been something like "Measuring real user solving times of various captchas" or something like that.