Probly I'm used to ayu's rushed release, so I didn't feel that rush when she did B&D-->(m)u-->Startin'. It's kinda normal to me actually lol
. Also, ayu was already in a stable state (in terms of her popularity). It's the music choice (B&D) that hurt ayu's future sales because somehow it scared the Japanese away
.
Kuu, on the other hand, has just begun her fabulous diva career, and I don't really think she should have released Cherry Girl. Also, I think avex revealed the release of Black Cherry too soon. I remember that (m)u wasn't announced until it was close to the release date of B&D. Black Cherry was technically announced right after Cherry Girl had been announced.