It's funny that you focused on that instead of the rest of their comment. By "20 IQ points" they clearly mean it in a metaphorical or analogous way to humans, of course they are not literally measuring the IQ of an LLM.

Because the rest of their comment was basically "it's so good because look at how good it is!".

OP equates number of tokens with intelligence, I do not.

OP then mentions a hyper realistic video game. Cool, but also not exactly evidence that AI could be plopped on top of that to make Jerry Springer.