I somewhat got the feeling with the iPhoto, Safari, Podcasts app, iOS 6.01, etc. update rollout that took place last week that they were originally supposed to be updates that would coincide with iTunes 11.
I don't think so at all. Maaaaaybe 6.0.1 iOS, but everything else is largely unrelated.
iTunes always has an update version around this time, that coincided with new iPods. Any other software update is generally just coincidental.