It looks like a report on quantity of instances (sites, frameworks, packaged setups) but doesn't go into other metrics like traffic load, users, PnL or other money-metrics. Say the top 100 websites were all to use PHP, that would be a very different story than none of the top 100 websites using PHP, but neither is reported. We have some "we are in the top 500" and "we have billions of page views", but not much else.
That said, how good or bad a language is might not be quantified or qualified to a point where all audiences are happy. How it's used vs how it's structured, where it's used vs. how much money it's making can all mean different things to different people. If you look at it from an academic (CS) perspective it might not matter how much money it makes if it lacks some scientific nuances. But the same works the other way around as well; it doesn't matter how cool COBOL, FORTRAN or lisp is if you can't run your massive eCommerce web app with it (there is a joke in here somewhere).
That said, how good or bad a language is might not be quantified or qualified to a point where all audiences are happy. How it's used vs how it's structured, where it's used vs. how much money it's making can all mean different things to different people. If you look at it from an academic (CS) perspective it might not matter how much money it makes if it lacks some scientific nuances. But the same works the other way around as well; it doesn't matter how cool COBOL, FORTRAN or lisp is if you can't run your massive eCommerce web app with it (there is a joke in here somewhere).