Yes, it pulls the details and reformats it into Paprika's format (separating ingredients, directions, etc, and even doing things like bolding any mentions of time in the recipe instructions). I'm guessing it works best with a few specific formats (I notice that Chowdown cites it as their preferred recipe app, and if definitely pulls well from it, as well as from the standard recipe card that seems to be on most cooking blogs), and probably some major sources like the NYTimes and Bon Appetit.

It's actually a javascript applet, so I could totally see it not working because of a security restriction on the site.