I definitely seem to be getting software updates faster on "advanced". Now, I get "my" update within days of it showing up on teslafi. For example, I may not get 2019.28.1 but when 2019.28.2 comes out and it is meant for my car, I get it almost immediately. In the past, I used to wait weeks before getting "my" update.
So "advanced" may not give you "early access" but it does seem to push out the designated update for your car quicker.
So "advanced" may not give you "early access" but it does seem to push out the designated update for your car quicker.