I think this is rather amazing. And kudos to the creators, but I cant help but feel that the "Create a site based on this design" is a little on the ethically grey side. Essentially saying copy this persons design and charge me for it. That being said it does seem to (using the Machine-Learning / analysis) err on the side of being less evil more clever.
on the other hand, I feel the sophisticated language is rather shallow, probably based on simple rules (e.g. if a form is dominant on the website, add "accepting" to the opinion).