The comment really doesn't and I don't think you can conclude that generalization in another way either because there are too many counterexamples in the map. There's no way the expensive Internet in Uganda is superior to Sweden's. Furthermore, qualitiy varies much more in the US than it does in Sweden where its universally high quality and slightly cheaper. French and German internet are both pretty good but seem to differ greatly in price. Portuguese internet isn't that much worse than Spanish (unless you count the annoying setup for Portugal.) Check the map for even more counter examples.

If I had to guess the prices probably have more to do with subsidies, general infrastructure quality and competition than resultant quality.

I didn't mean to, nor did I imply that price and quality are correlated. I gave the prices as a quick reference to the link, and the commentary is my own personal experience. You're welcome to interpret it however you like, but please don't credit me for how you interpret it.