Ya, a little good luck to he, but not so much...

I have seen video-games bots that does that unbelievably well. Some powerbot.org scripts are sincerely more human than myself.

http://phantomjs.org/ makes this easy enough to do.

You seem to be assuming Google doesn't know of PhantomJS and many other automation frameworks. In fact, I personally wrote some of the code to detect them - not in ReCaptcha, but in a closely related project (which ReCaptcha may be using, even...)

I'm pretty sure you can just harvest mouse movement information and train a computer to mimic that.