I've had my car for six months. I believe there is some sort of timeout from the behavior you describe unless something has changed in 5.0, meaning the quick accessibility reverts back to the slow mode after the car isn't contacted for some period of time. Would you mind retrying this after 1/2 hour and an hour of no contact with the car? Thank you in advance.
I don't know when the sleep goes back into effect. Has anybody figured that out yet? In 1/2 hour or hour, it is possible that the car goes back asleep. My point being is not to keep the car awake, but that one could simply launch the app, then go about his or her business for a few minutes. The connection should then be almost instant.