I finally took the plunge to performance mode (always used browse mode). I have my rhythm sounds organised in one performance and lead sounds in another. When going from one sound in my rhythm performance to another in my lead performance there is sometimes a huuge lag. Up to a second. Browse mode was never fast (rig switching time is about 200ms) but a whole second is just too much for me.
Guess it’s back to browse mode.
I am using a standard midi controller (fc200).