reCAPTCHA challenges cause high frustration for users without putting up a serious barrier to sophisticated bots. Google's announcement of new No Captcha reCaptcha looks like it will solve a lot of those problems, using engagement/interaction clues as primary way to identify humans vs bots. And it's mobile friendly!
@johnnyquachy@irosenb agreed - the nextweb article does a good job laying it out as well: http://thenextweb.com/google/201...
Their main site doesn't seem to be updated yet despite the blog instructions to check it for info.
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