They're making fun of Bootstrap, but having classes that allow you to define margins and padding quickly by adding a class is actually really helpful. Of course that shouldn't be expanded to every possible property.
http://penguindreams.org/blog/jekyll-3-and-foundation-6/
Adding "row-xx" or whatever to your HTML elements is basically going back to the garbage that was in table based html layouts.
Then again, semantic markup was a huge pain in the ass before tools like SASS. Now you can actually name and categorize elements semantically in the markup, then decide what that actually means in the pre-processed CSS.
Edit: And it's true: Having recently gone through even a simple bootstrap-to-bootstrap redesign, we pretty much had to comb through every view and remove/replace non-semantic CSS classes. With SASS mixins and semantic markup, it'd have been a CSS-only change.