I mostly agree with you, but I actually think the original poster was incorrect in calling such low-level details "basic computer science" concepts. They are basic systems programming concepts. One can know a lot of computer science without knowing such things - you can probably find computer science professors who do strictly theoretical work that wouldn't know these details well enough to explain it.
I agree with your statement. However, that is not what I meant. The poster gcc_programmer was talking about very specific points about how "the stack" (not a stack) for a stack-based language gets implemented.
