Disagree. There are a lot of reports where they "didn't" get any update (I'm still on .19, since mid-July, and have a 70D, the same model and options that others reported getting updated). I've tried three times driving to the SvC, rolling slowly through the parking lot and nothing. Down the block at the Sales and Delivery Center in Costa Mesa, I spend an hour at the Sunday Social last week, parked against the building. Nada.
So I think that there is indeed merit in trying to decode this whole "geofencing" thing. I agree it's more than placebo, but it's certainly far less than 100% effective, even on repeated attempts.