AFAIK it won't make any difference.
I have had my card programmed as an AU, Toxic7 and Toxic6.
None of them currently Auto-Updates.
As for yesterday's key-roll - Mine didn't go off either, unless they did it overnight. I'm amazed that they didn't schedule the roll-out for during the football, but there you have it.
Hopefully, the next edition of Atmega AU won't be too far off.