I had a 60D and when I reached out to my delivery adviser/specialist (forgot the term) to ask if I get "uncorked" as a 60D...he replied with instructions to upgrade to a 75D. He didn't explicitly say I had to upgrade to 75D, but it seemed like he was inferring it.
Anyhow, upgraded to 75D last week. Called my local service center today for appointment. She asked me when exactly I upgraded and I told her 4 days ago. She said that "should be enough time for the VIN check to be updated". She had me on hold for some nervous moments while she checked...then came back on the phone to schedule the appointment! So unless something unexpected happens when I get there, it looks like I'll be uncorked later this week. Didn't need the range (and was kind of proud of how well I could road trip with a 60) but definitely wanted the performance. So I upgraded. Maybe later down the road (perhaps) they will offer the uncorking to un-upgraded 60D owners. But on the other hand, maybe not. Or if they do, it could be a relatively long wait. I also figured that it does bump the resale value somewhat and having the extra range will allow some additional flexibility on a road trip (maybe skip the 15 minute Gilroy top-off on my way to SoCal for example). I'm excited!