I present the HN front page as a prime example. Every time I load it from my phone I groan at the prospect of dragging a small viewport all around the content area in order to read the full titles/comments of submissions. A responsive design with a simple list interface would easily solve this problem.
Furthermore - from what I remember of UX modules at University the whole point of good responsive design is that it presents the same content to the user as they would expect from a desktop interface. You can't cite an example of someone not following a practice as a reason to not to follow that practice.
At the end of the day - this article was about designing websites for small businesses who are looking for customers. These people are not involved with the content you present to them straight away and are, by definition, "browsing". As such you can expect anything less than a seamless, "quick" experience to harm their eyeball conversion rates.
TL;DR - Nope.