When talk about quality, it's subjective. Of course we could look at metacritic to show his opinion goes against the grain but that still doesn't make his opinion wrong. It's how MS got away with the "best line up in Xbox history" slogan a few years agomy opinion is that kim jong un is a better martial artist than Bruce Lee in his prime. just because opinions are subjective doesnt mean they cant be wrong. and the general consciousness is that Halo 5 and gears 4 were not up the standards of last their previous entries. he might be right about Forza, but thats about it.
and that slogan was utter battleship. i remember they wanted to pull the same thing off this year too, well at the start. then everything got delayed into next year.