According to most websites I see, ‘responsive’ design does not mean optimal/usable design. Linearizing the layout is only one step.
If the logo takes up ¾ of the screen on every page and the eventual text is some narrow typeface in light gray that’s no more discernable than a pencil smudge, among other problems, well...
That’s why browsers supply a Reader feature now (thank goodness), because web ‘designers’ (and site owners in general) can’t be relied on for visitor’s sake, ironic as it is.