As for money being determined by your school of graduation... I don't think so. When was the last time you went to the dentist and said, "Where did you go to school, and before you begin any treatment, can I have a transcript of your dental school grades."
All your patient cares about is that you use doctor in front of your name and a have a little smiling tooth on your office sign. Things that might make a difference in earning ability are the little subliminal things that would cause a patient to have more confidence in your abilities - things like being tall or fatherly for men, being pretty for women, often things you can't do much about.
And sadly, contrary to what every ubersuccessful dentist out there will tell you, I think that even superior skill as a dentist will not necessarily increase your earning ability - does your patient really know or understand that your preps have margins three times as clean as the guy down the block. No, he thinks "Wow, he must be really good 'cause he and his wife both drive a Lexus."
Don't mean to be cynical here, that's just the nature of business. If Quasimoto were the best dentist to graduate from Harvard in a century, he'd still end up being dirt poor. You just gotta committed to giving the best quality dentistry you can give and use what little business sense you've acquired in your decade of post highschool education.