I don't think this is test data as others have said. All my Q&A experience (which is what a Beta test is) has been on live, anonymized datasets. Basically, a complete replica of what production systems are hosting.
There is no advantage in running a limited, deficient data set during final phase of testing like we've been doing with iOS 6 for the past couple of months. With limited datasets, you do not expose the code to conditions that might arise with the full data set.
No, at this point, thinking we're pointing to some kind of limited dataset for maps is wishful thinking. This is it, according to my experience and opinion. It was it a few months ago. It will slowly get better, but Google doesn't stand still. Apple will have to work extra hard to play catch up.
In the end, we pay for their choice. If anything, I think Apple should drop all the base applications from iOS except for the Web browser, mail client, music player, the App Store and iTunes store. Let 3rd parties have a crack at it, I don't need shoddy maps/weather/stock/reminders/notes etc...