I find it weird that people think of Yahtzee as the be and all and end all of (web based) humour. Admittedly, he is very clever and inventive, but he's certainly not the first, although he may be a pioneer (can't imagine how he'd feel about that).
I've noticed the influence of Yahtzee in a lot of the written work here I've seen so far, although I will admit that perhaps I'm just looking for it because I'm browsing the same forum that hosts the videos. And then to get called out on it when you use it so close to home shouldn't really surprise anyone ("I recognize that Yahtzee said something like that in a ZP", "I like that Yahtzee/ZP reference", "You kind of sound a bit like Yahtzee there"). I will say that it could be a bit bothersome when you try to develop a niche voice as an author, and your works automatically get compared to the roaring echo of Yahtzee's disciples just because of proximity. But it's for the most part harmless outside of the escapist so long as it's not relentless to the fact that you owe your persona to Yahtzee only to get called out on it later on down the line.
I'll end by saying that I've been a cynical misanthrope for years before ZP even began, and there are cyncial misanthropes everywhere who have no idea what ZP or Yahtzee is. Don't stop treating Yahtzee like a God, but I'd appreciate if you'd stop writing every one off as pretender if they bare even a slight semblance to his style.