RE: Responsive Web Design
Some approaches are just broken-by-design. That is, they don’t deliver their promised utopias.
Programmers - Stack Exchange: Responsive Web Design vs. User-Agent Sniffing
“… in practice, I’m starting to get the sense that the CSS3 media query feature, and the whole “Responsive Web Design” movement, may not live up to its promise. … at this point, the resolution of mainstream smart phones is getting pretty close to Desktop-level resolutions. The ability to detect whether a user is viewing your website via a smartphone, tablet, or desktop, seems to be increasingly difficult if all you’re going by is screen resolution.”