[kjhughes]

They seem to be merely detecting the aspect ratio of the browser window, and their message is equating portrait to mobile, even on the desktop. When I made my desktop browser window wider than tall, it got past that imperfect check they're using.

[danpalmer]

Yes they are, I just found it an amusing juxtaposition. Also perhaps a little unforgiving, given that I had a roughly square viewport which was definitely not a problem.