It looks strange when they talk about the responsive layout on a site that takes about 1/6th of my screen width... pretty much a thin stripe in the centre.
No. Font size, kerning, multiple columns, etc. are all better alternatives.
I wouldn't mention it on any other page. It's just that this article is about responsive page design. But it's not responsive itself. The post itself mentions: "Use a big font size and an adapted line height (this template uses 16px / 24px)." and "To design a responsive layout, we have to forget about the usual static 960px width layouts"