We are informed things are tracked here somewhat. But as you know with any invisible hand, it is difficult to know how much is tracked, and how much is ignored, or not deemed significant. Occasionally we have seen Apple techs in the AppleTV forum more often than others, and that's why you see the Apple logo in the Terms of Use as one of the icons you'll see.
We can't speculate or guess as to Apple's policies on this account. All we know is that Apple's support is the best rated in the industry. I would personally attribute that to the personalized attention one can get through AppleCare, and the numerous end users who are willing to offer good help, as well as the relative simplicity of their systems.
I would strongly recommend you search
http://www.apple.com/support for answers to your many questions. Many of the moderators here have also a hand in getting those knowledgebase articles written after seeing issues on these boards.
Use your AppleCare whenever you can to get Apple to be informed of issues with your computer.