This reply is both correct and incorrect. Tapepsi is right in saying that you must send all your scores to all schools. You cannot withhold that information from any school. As for the sentence, "schools hold off on making decisions until they receeive your most up to date score," this is incorrect. This occurred to me when I applied. I took the mcat in May of the year I applied, got my scores and submitted my app in June, and hated my score so I scheduled a retake for August. About two weeks before my August mcat scores arrived, I received an interview from a school based on my May mcat score. So, it is possible to receive an interview before you receive your mcat retake score. I won't say it is common, but it is very possible.