The autocomplete timings are one part of it. I am more concerned about other parts which are not publicly documented and seem to contain possibly identifiable information. I will be very happy if my suspicions are proven unfounded.

Aside, there seems to be an RLZ parameter in Chrome, which is purportedly absent from Chromium. The RLZ parameter comes from [1], which according to that page is now integrated into Chromium. By manual inspection of the AQS parameter value, there seems to be some identity of the browser included in it.

[1]: https://code.google.com/p/rlz/