I just updated my portfolio with my major work in the last 8 months. Three high-traffic websites all running on Drupal!
I especially enjoyed taking what I had learned in the Sass plugin, Sass Breakpoint, and creating my own for Lessjs. I am planning on documenting how I accomplished this in an upcoming blog post.
Responsive design techiques are still in their infancy. There was a time when I would have had to create two seperate websites: a desktop site and a mobile site. When tablets came along, and HD (Retina) mobile screens, responsive design simpilified and made everything more complicated. We don't need seperate websites, we need one great website that adapts to different screen sizes.
As responsive design has advanced, mobile technology has too. People tend to upgrade their smartphones before their computer. This has helped getting a modern website to run smoothly on something that can fit in your pocket.