It took 4 weeks to get the chargeport replaced! As noted above, I dropped it off on September 8. As of September 27 (almost 3 weeks after I left it), the car was still at the Dedham Service Center and had not been sent to the body shop! It turns out that the "body shop liaison" guy thought it had been trucked to the body shop, but it hadn't! So it went there the next day, and came back a few days later. At that point, the same "body shop liaison" realized belatedly that there was a second piece of work that the body shop was supposed to do, but which he hadn't been aware and had not arranged. (I had asked them to repair my driver's door check, which has worn to the point of being useless.) He told me he would send back to the body shop for that. But I said no, I wanted my car back and said I would live with the faulty door check.
It was great to get my car back after a month! Especially since it was, in fact, a pretty minor repair. The car charged OK last night at my house. The charge port acted weird when I tried to unplug, but once I re-booted the MCU it seemed to work correctly.
I was disappointed that one of the two shops made rather a mess of my trunk area, not being careful with the various things I had there. In retrospect, probably I should have removed my cleaning supplies, charge cables, tire pump, etc. Apparently they had to remove the entire trunk liner, including the under-floor storage part. Some clips were left off and the pieces do not all fit together correctly, but I am going to live with it, I think.
I do not yet have an invoice, so I am not absolutely sure what parts they replaced. I hope they replaced the chargeport and the ring light. Those were on the initial estimate.
Long ordeal. Definitely the worst service experience I have had in 8 years.....