I've also had this problem and uninstalling/reinstalling didn't work for me. I hope the issue is resolved quickly, I typically use the mobile app in the car and not being able to easily forward through a track indeed renders Spotify mostly useless to me.
After using the app for 2 days after re-installing, it's back to a crawl. I'm not sure if it has anything to do with local files synced into the app, or just being used for 2 days. The solution therefore does not work completely.
Considering that I spent in the last months more time with issues in the app than enjoying music and, additionally, considering a number of functions that me and a lot of users like me, are waiting for long time now (landscape on IOS and buffering of next songs to avoid reproductions gaps, just to make 2 examples) I decide to cancel my premium subscription and move to Google music play.
I feel a little sad doing that because you were the first offering this service and I was your customer for long time now, but I feel the service is not any longer matching the expectations. Specially on the customer care site, in consideration that we are paying 9,99€ each month.
Thanks for the good music you provide to me on this time.
This IOS release is a HORRIBLE! it takes 5 seconds to just move to the next song. I wind up pressing it 10 times then over the course of 90 seconds, it slowly moves forward one song at a time with huge lapses.. I will kill it then and have the same thing happen again after a pianful restart.
I have used SPotify for years. Now looking for something else. what a disaster. Do you test your software spofity? Using a Ipod Touch v5