Anecdotal support: for the Android users I know who fall into this group, it manifests as a vague set of complaints -- certain apps don't run, had to take it into the store a lot, app claiming to be available for Android not available for their phone -- which are all symptoms of having what is called here an orphaned phone.

So yeah, they don't know or care whether they are running version 1.x or 2.y. But they do know that they are generally dissatisfied with their phone.