I had thought that this was canon. As I was not following Monty as a cow and had no knowledge of him prior to his interactions with Nick, I assumed that there'd be screenshots of YouTube comments to support it. But I wasn't about to go trawling through pages and pages to try to find it just to refute some troll.
You know what, though, I'm not married to the claim. If you say it never happened, as I have no evidence that it did, and since even Null apparently edited down the OP in Monty's thread to say that he wasn't able to find any proof of it either, I'll concede the point.