Responsive Design Isn’t Breakpoints
Amber describes the problems that many of you will probably have experienced when it comes to clients wanting to know which devices you’re making the responsive design for…ergghh.
This is, of course, thinking about responsive completely the wrong way. While it’s true I do test on an iPhone and iPad while coding, I’ve never “optimized” any of my sites for these devices. My breakpoints are never device sized.
An excerpt from Responsive Design Isn’t Breakpoints