As Jeremy Keith put it (emphasis mine):
This thread on whether HTML5 Boilerplate should include
Respond.js
by default (and whether the CSS should take a small-screen first approach) nicely summarises the current landscape for web devs: chaotic, confusing … and very, very exciting.
I for one tend to pledge for the Mobile First approach (see this presentation why) and soon my students will too, after I’ve brainwashed them during the upcoming semester 🙂