If true, this is a pretty massive difference, IMO. Part of the appeal of Knight was getting someone so young. He's still quite young, but I personally think the year between 18 and 19 is one of the biggest.
I was thinking exact same thing. I was amazed by the fact a 17 year old kid coming into the program could accomplish what Knight did and that made me think this was really a 3 man draft (Irvin, Williams, Knight). Now, a year older overnight so to speak, he still had a great accomplishment as a freshman, but not quite as outstanding as if he were a 17 year old doing it. Definitely hurts Knight's stock for these who thought he was a year yonger. Still a great prospect though, but now looks quite a bit below Irving and Williams. Still ahead of everyone else, but seems like quite a bit of drop off after first two.