On a side note just to let people know that not everyones mind goes to the worst possible idea of word. I tend to think analyticaly when I read, I thought fellow nerds would too.
The term retard and retarded are mechanical terms use to describe something that is or needs to be in the negative or backwards. This kind of a lose interpretation but gets the mechanical idea across. So used in this context the term is saying the x1 tital taking a step back.
Now I'm not saying the word was used here with that intent, but what I can say is that people all jumped to the worst possible use for the word.
Maybe we as a society are to blame here for letting our minds and our language be hijacked for use for other people's ideals.
I don't think it's a case "that people all jumped to the worst possible use for the word"; I think everyone's mind went to what was actually intended by the writer. I don't think that implies anything bad about the people interpreting it that way, that simply knew what he meant and disapproved.

