I can't see that anyone has asked, so what exactly was the problem you were having?

The sort tags are useful so you can have anything you want in the Artist tag (including Chick "Corea") and they'll still sort correctly - assuming in your example that you stored them without the quotes in the SORT tag. Without them aren't you just exposing other sort issues like bands beginning with 'The' or artists like P!nk or A$AP Rocky?