The author actually misses something SUBSTANTIALLY more important. He asserts that SL has the same problem as OpenGl, but never proves it. If Java has a bug in its type system then does C# also? Maybe, but maybe not. You can't infer one system does because another does based on the fact that both systems achieve somewhat similar goals.

Context went through the effort to do a proof of concept to show the OpenGl flaws. I think Google and Mozilla should at the very least show these same flaws exist in SL before asserting they do.