Thanks to all of you for your follow up. And thanks especially to grnamin for posting those screenshots from the website. Much obliged!
My takeaway is that most of the language describing the IA privacy policy that is contained in those screenshots is boiler plate; as such it doesn't really tell me much. Some of it clearly relates to things like online interaction with Ineos which I simply won't do. (Once I saw there were several pages of privacy disclosure on a new vehicle survey that I received via email a short while ago, I binned the survey!) Also, as ryket tellingly observed: "I assume the info on that site is at best based on Ineos's privacy policy, not the actual capabilities of the car."
I would be happier if I knew for sure that they wouldn't have access to my driving history when I take the car in for service but unless someone has a crystal ball, it may be necessary to assume the worst. But from my perspective that's a lot different from tracking me in real time.
The absence of a SIM card (and -- in the US market -- emergency call button) and no over the air software updates makes it really unlikely that any data flows to IA outside of a service visit. Which means compared to your typical new car, this vehicle is actually rather privacy friendly.
(I'm not too worried about the NSA or the GCHQ or the Mossad since they're a lot smarter -- especially the Mossad -- than I will ever be!)
All in all I do rather love my new beast and I'm looking forward to hitting some places in central Maine in a little less than two weeks.