Jeez man, you're reading to respond and not reading to comprehend....
All he said was that McDavid (and Gretzky... and a LOT of guys) throw around superlatives like "best... greatest...toughest...etc." like it's nothing... Gretzky is a good example because most people consider him untouchable, however he's said things like "Kyle Turris has the best vision of any player in the NHL".
Gretzky is very well known for heaping huge amounts of praise onto various players. He loves to say certain guys are "the best since *insert all-time great*"... He's also said on multiple occasions that certain players were going to break his records... I think he said it about Tavares once, he's said it about McDavid.
If you didn't know this about Gretzky, that's on you, but you look like kind a jerk poo-poo'ing on this guy about something that he's actually correct about...