I don't disagree and I'm not trying to argue with the article or anything. I was just hoping to point people interested in the topic towards things that took me

I don't disagree and I'm not trying to argue with the article or anything. I was just hoping to point people interested in the topic towards things that took me a while to realize/run across. As for Io's efficiency, I think that's more about the implementation than in the language. Javascript (prototypal inheritance) and Smalltalk (message passing) aren't that far off and both have decent performance. I know Steve Dekorte was working on getting Io running in javascript in December but I don't think it's a high priority project for him.