A quick google search shows that the really fast guys on superstock bikes area runnning in the 1:35-1:37's, with a 1:34 as the best ever.
http://www.svrider.com/forum/showthread.php?p=499944
Of course those are expert riders on race prepped (read, good suspension, mildly massaged motors, with a little weight reduction thrown in).
My advice to you as a B group rider is to put the lap timer away and spend more time working with CR's. They don't call them crash timers without reason. Working fundamentals such as smooth throttle, steering & brake inputs, body posture, and lines will do more for you than chasing lap times.
Put good suspension (a penske out back and springs/emulators up front) and ride that thing. SV's are slower than the 600s/1000s, but not that much. At Road America (a 4 mile track with 3 straights) last year, there were only 3-4 bikes that were going faster than I was on my SV, and that was in the Intermediate group.