I've seen this from Chief fans before. 2005 they were talking super Bowl the first few games. There was a lot of optimism. Then the Broncos undressed them on national TV and they limped along until they finally pulled it together at the end of the season with 10 wins. Alas, they still missed the playoffs.
Point being the Chiefs are an average team where last year they were complete trash. The distance between last year and this years' average is so big, and the Chief fans are used to such crap, that they actually think they are awesome because to them they ARE awesome. It's like a trailer park resident staying in a Holiday Inn and thinking they're living large. "OH! Look at the shampoo AND lotion!"
They'll get knocked back down to Earth, and soon will grow bored and even resentful of captain dump-off.