Earlier quoted context omitted.
Sweden is a country with the population of New York, but have one (sometimes two) universitites in a global top ten ranking of their respective subjects. So if you must compare to something US, do it with a large city.
http://www.timeshighereducation.co.uk/world-university-ranki... . Sweden has two universities in the top ~100. Boston has three. New York, Los Angeles, Chicago, Atlanta, San Francisco, and Pittsburgh have two, mostly in the top 50.
But hey, I'm cherrypicking data here, so it's not relevant to anything else than as a counter data point to a very broad and wrong statement.