Dunno why electroly is dragging me into this but I believe you've misread the article. When it says "His languages take significantly after APL" it means the languages themselves and not their implementations.
The article: "Let's make sense of the C code by the APL guy"
Do you think the article meant to say it was more likely that the code wasn't inspired by APL?
The article: "Let's make sense of the C code by the APL guy"
Do you think the article meant to say it was more likely that the code wasn't inspired by APL?