If you look back at those that preceded Jeter, he looks pretty good !
I don't remember who manned the position before Bucky Dent who wasn't exactly great but held the position in the late 70's-early 80's. Those that filled the spot after Dent and before Jeter came around in 94-95 or so , really sucked. 20 years of Jeter was a huge improvement over years past.
A-Roid took the SS position to a whole different level as a total slugger playing a premium defensive position known for light hitters.
Didi was far better than Jeter, as was a tainted A-rod, now with Gaybar Torres there, he's potentially far better than any other SS, and a certain HOF player barring injury, scandal, etc