I don't think it is. I think its the 3rd kind: "I didnt say what I thought you said, but I can see how I hurt you and I'm sorry". Assuming that's true - which I think is a reasonable assumption based on how he teaches and his blog post from last year about being nice - it would seem wrong for him to post a full out apology.

no it's definitely a "I'm sorry for offending you, but seriously fuck you for using node."

He definitely said that in the later tweets. Maybe you're right - its definitely less of an apology than his comments merited.