Just a hunch because that's what guys do. People will say they're not ready, which they're not, and it doesn't matter. Pro teams only care about upside for good reason - you can't win the trophy with a bunch of nice, solid players (look at the 76ers).
Should be really good again regardless. A lot of people think Carter-Williams will have a Sherman Douglas type career. If Christmas improves his sophmore year half as much as Melo did he'll be good; he looked good yesterday. Plus there's Coleman & Cooney coming in.
Big difference between Melo and Christmas was that Melo was just fat as a freshman. Christmas is relatively unskilled and skinny. He could make a leap, but I would hope for it by his junior year, not next year, if I were you.