Not too long? That's way too long! This is likely the death knell for me and Spotify. Their product development decisions are about the worst I've experienced in a software platform. To roll out new features over periods of months across platforms as they continuously do without improving existing features is ridiculous. Of which this particular issue is not the worst. The fact that there is no easy way to transfer my 20,000+ starred songs to my "Your Music" is the worst.
I actually got tired of waiting. I've canceled my premium membership as have a few friends. I need the same functionality on ipad and iPhone. Otherwise, it's useless to me. I'm trying out beats music for now. I'll join again when the ipad app is updated unless I stay with beats.