I'm learning C# so I've got a little bias but the author says that C# never really took off? He doesn't even list it as failing one of his criteria. He says in the comments later he bases it off of it's listing here http://www.tiobe.com/index.php/content/paperinfo/tpci/index.... . Baloney I say.
He ends up with Scala, which according to TIOBE is 27th with 0.433%.
Interesting read, but clearly this is making the solution fit the data more than the other way around on the original author's part.