Plenty of commits have said overly positive things about their school (there's a reason they committed, after all) and later decommitted. BTW, here are some interesting quotes from the middle of December after Taylor visited for the banquet.
“First, Ohio State stopped in, but I didn’t even talk to them,” he said. “My coach told them that I’m committed to Notre Dame and no thanks. They said if you change your mind let us know. Then Coach Meyer called me, but I told him I’m happy with Notre Dame. He respected and he had nothing but nice things to say about his time at Notre Dame.”
Decker quickly put those rumors to rest after an in-home visit with Notre Dame assistant Tim Hinton.
"I'm committed to Notre Dame, that's the school I want to go to," he explained. "I'm not looking to hear from any other schools, I'm happy with where I'm at right now. It's crazy how fast stuff can spread over the Internet. I’ve never once thought about taking other visits. The staff knows they don’t even have to recruit me anymore, that’s how solid I am.”