I don't think either is unsportsmanlike. I do believe you can do both without being cocky or unsportsmanlike.

There are a few in 10u now that would of benefitted from not pinning every opponent in 30 seconds or less in their younger years. Now it is getting harder and they can't handle it. They don't know how to wrestle a full match.

If my son is wrestling an opponent that he doesn't know or a tough one he pins when he can. If we know he is a level above I make him try more than one new move. It's how he learns.

But 100 percent of the time he does it in a respectful manner.