I just spoke to my mechanic at my dealer today. He basically confirmed it. During scheduled services he follows a checklist and the checklist will include an item like "update ECU". So he does it. He doesn't even know what changes are made, he just connects it and let's the update happen. He also said he didn't know positively that tune map changes do happen during these updates, or if they don't, but wouldn't rule it out. I for sure will tell him not to do any ECU updates any time I take my bike in.