Many elements can be responsive by just letting things float in them. Their width can be governed by their content and outer constraints. One can then define minimum widths for things. This way most of the responsiveness becomes simple and there is usually no need for media queries reacting to a specific width of arbitrarily chosen 1200px or similar. Elements float to the next line, when they don't have enough space any longer.

I understand this as criticism against designs, that are "responsive" in a way, that they simply "snap" at a specific width into a full blown "mobile" looking view, instead of seamlessly adapting to available width.