Craig button saying he would take Matthews over every first overall in the last decade not named Crosby/McDavid is serious hype.
Is it that nuts? His production (in the NLA, USHL and WJC) has been elite, and he's about as complete a package as you'll see. Big, natural centre, protects the puck very well, super high IQ, top notch hands, really good shot, he has it all.
I think he's definitely in the conversation with the other top 1st overalls at the same age (Tavares, Hall, Stamkos, Kane, MacKinnon, etc). For a single scout's opinion, I don't see anything crazy about having him at the top of that group, when talking about how you'd evaluate them pre-draft. Others would have him lower, but scouting is not an exact science.
Also, seems like he was really saying "I have both Matthews and Eichel below Crosby/McDavid, and roughly tied with Tavares, but ahead of every other 1st overall since Crosby (in terms of pre-draft outlook)". Seems reasonable enough to me.