Its good that you were able to analyze your riding.
IMO your corner speed is not only a factor of your turn in rate but how much you brake also. just practice and slowly up the pace. on a 600, its really important that you get the whole corner correct so that you are at the peak of your powerband as you are exiting to maintain good speed. if you screw up the entry, you tend to charge the apex and then you end up wide or you just dont have enough rpm to get your bike to shoot out. Also, relying on engine braking to set your entry speed is wasting time-it should be either on the brakes or throttle.
lastly, it doesnt hurt to ask a local for tips. have someone take you out for a few laps and you will be amazed how much faster you can be with the right person leading you.
good luck!
ps..i envy you guys.. riding season doesnt start until next month for us in the central region.