The new University of Notre Dame website is already a classic. The responsive approach and superb details make this worth every second of your scrutiny and study. I found this via this great interview about nd.edu here.

I really like this answer to why the team chose to go the responsive route:

What inspired you to take this approach for ND.edu?
At Notre Dame, we have a long history of trying to make things accessible. Mobile and responsive sites are a part of that tradition—it’s a way of making web content more accessible to more people.


Gene Crawford

With over a decade of experience in the industry he has overseen the design and architecture of hundreds of web sites and applications. An active member in the design community, he's the editor & producer of unmatchedstyle.com, the ConvergeSE, ConvergeFL, ConvergeRVA and the Breaking Development conference series.