Just as a reality check, if we're picking nits about what's actually an answer to that question, this is the only answer that actually answers one of the questions asked.
At the time of that answer, there were four sentences in the question that ended with a question mark:1
- "What is the name of this operator: "-->"?" (the title)
- "Where in the standard is this defined, and where did it come from?"
- "On a more subjective note, I've never heard of this before, had anybody else?"
- "Is it worth using?"
If this were a serious question (it wasn't, see edit), then sure, it's not the best answer. It could've linked to the standard or quoted it. It could have answered every question asked. It could have even explained the joke. But hey, satire in, satire out.
If the question is "Where is this defined?" then "It's defined in section XXX." is most definitely an answer.
Whatever else this answer might lack, it can't reasonably be deleted on the grounds that it doesn't attempt to answer the question.
1 Since then, the last two have been dropped, but "Where is it defined" is still there.