[algorithms]

The first point is actually the best thing that has come from Mobile Design thus far. It significantly reduced the amount of unnecessary distracting Ads on the page. Since, as you've said, they are usually used to fill the space larger Environments offer.

I've used the mobile first approach for my last project and I think a site isn't truly responsive if it hasn't a liquid(%) layout. Building those layouts is a pretty messy thing though :(