Good in theory, bad in practice. I will fully admit that this is how it should work, but the soapbox site immediately points to the trouble you get from it. From simple things such as an email field that doesn't say it's an email field, and running out of the viewport boundary because it's too long, to issues like the top banner cutting the photo wrong on the Stay Connected page, and having to scroll down deep to get to content. I find this site looks a lot more unusable on a mobile device.
I applaud the Boston Globe for doing this so well, but I have yet to see other good implementations on proper big websites.