It is probably shifting near 6k for you when you're in Normal/Manual and not in Sport/Manual or Sport+/Manual. A nice feature of the JB4 tuner is setting the Shift Lights at your choice of 100 rpm increments between 6k and 7k rpm. The 2 green turn signals in the instrument cluster flash!
True, 6-6100 rpm results in the fastest acceleration.
http://www.youtube.com/watch?feature...&v=fBv40XoMFnw