When Michael became an adult his singing style changed dramatically. He became a song stylist, still a very good singer, but it took a big adjustment for those of us who had listened and gotten accustomed to him in real time in the early 70's.
When Michael was a kid, he was a bonafide badass SOUL SINGER and had the technique and genre down pat. Control, intonation, range, deep vibrato, dynamics, phrasing, he had it all. Dare I say as a child he was one of the best soul singers ever, including his adult contemporaries? I'm still blown away when I listen to those early J5 recordings.