I tend to agree we probably don't have a future NBA player on the roster. Pretty difficult to make predictions on some (some) 18 year olds, though.
How many people do you think, three or four years ago, were saying Wesley Johnson and Gordon Hayward would be top 10 NBA picks?
And remember, we're talking about possible NBA 2nd round picks here on the roster, not top 10 picks.
How many people thought Ryan Bowen or JR Koch or Les Jepsen would be second round NBA picks when they were 18 years old?
Not unrealistic to think one of the kids on the current roster could be a second round pick one day.
You could say the exact same thing about every freshman in the country then. Iowa is not the only team with freshman tearing up summer leagues.