i can't speak for Good or Tyson, but i can tell you right now:
Mike Adams will not leave OSU. he goes to Dublin Coffman, which is, for all intents and purposes, like Farragut is to Knoxville. The are basically sharing borders. His school is a noted pipeline to OSU, and he has been a major recruiter for the buckeyes, hosting other recruits and making efforts to get others to commit to OSU. he's solid.
Kyle Rudolph and Omar Hunter are solid locks to ND for a few reasons. #1 is the new "Mack Brown" policy that ND took over... get commits early and secure them. It's stressed to the recruit that if he is even thinking about wavering and is not 100% sure, then Weis won't let him commit. Secondly, Weis is known for developing and using TE's, and Rudolph will flourish in that system (where their #1 TE caught like 40+ passes last year in just 9 games). Omar Hunter was considered by many to be a lock to Michigan. He grew up a UM fan, and visited ND on the way back from what he was considering his final visit to UM, but he was so impressed that he committed to ND instead of UM, pulling the huge upset. He was their #1 target for the NT position, and they are razor thin on the DLine... he is looking at playing time from the start.
as far as Good goes... this is just a guess: he's a kid from TX who committed to OU... and it's always darn near impossible to get the elite TX talent to leave TX or Oklahoma. i seriously doubt he would renege and choose UT.
I don't know enough about Tyson, because he committed to UGA before i had the chance to start following him.