I have yet to see a Cruz supporter claim that he will win NH. But I listened to Trump supporters tell us day in and day out that Trump was going to win Iowa in a yuge way. If you attempted to temper their enthusiasm with anything factual, you paid the price. I hope that Trump and his supporters go into NH with more humility.
Relying on the celebrity bandwagon may not work in New Hampshire much better than it did in Iowa. However, that celebrity bandwagon could get him the nomination in the long run.