Came here to say this. They did a knockout job with this. Some pieces that just aren't easy to make responsive are done really, really well. For an example, check the filtering mechanism here: http://www.rogerebert.com/great-movies.

Also- the infinite scrolling is lightning fast. They're getting JSON and throwing it into a template(?) while loading images from Cloudfront. This is the way it should be done.

Big ups to the devs behind this. A migration is never easy and it looks like they handled it expertly.