The Kingsdale music test doesn't always throw up what you expect. DD2 (15) is now very music-oriented - national youth choir, national children's orchestra, government funded place at specialist music school, etc etc.
However, in Year 6 when she applied, Kingsdale gave her a half scholarship for music, which wasn't enough to get her in.
She was about grade 5 on her first instrument (flute) then, and grade 3 on her second (cello). We hadn't prepped her for the aural tests as we aren't musical.
Should we have prepped her? Yes, probably. And we shouldn't have let her play her second study as it counted against her as less advanced.
We spent several years afterwards thinking she probably wasn't very musical, despite her enthusiasm, because of the lack of scholarship because we assumed that 'Kingsdale must know'. In fact, she still thinks she's a bit rubbish at music because 'Kingsdale didn't want me'...
I guess what I'm saying is no music test is perfect!