While I understand what you mean, he can say whatever he wants. This is a message board - unwarranted optimism and unwarranted pessimism is part of it. There aren't any unwritten rules that say you have to predict that Nebraska is suddenly going to land 5* players.
For the record, I agree with LP1. I think Nebraska has a chance to land Sanders, actually, but at the end of the day the recruiting operation at Nebraska must doesn't have the ability to lans high level talent. I certainly hope I'm wrong.