Mine too, it is sometimes a bit slow and I find myself operating the dial twice.The amount of time varies on mine. Sometimes its almost instantaneous and others it can take a few seconds as the car seems to go into hibernate mode instead of standby.
Yes.Partly depends on whether they have Sentry Mode activated, that has to keep the cameras rolling and record.
Ditto. I find that once I've sat in the seat, made myself comfortable, and put on my seat belt, the screens have booted up. I then put my phone on the shelf (magnetic connection to the USB cable), press brake and select D/R as needed ... no delays observed.The D or R selection on mine is instant every time, although I do wait for everything else to boot up before I press the brake pedal.
That's one of the reasons it needs to be programmed to remember all your settings.You can always put the car in drive and move off immediately no matter what the central screen is or isn't doing. The problem is that you can't switch off LKA if the screen hasn't booted.
But even if that were in place, user settings wouldn't be effective until the screen boots anyway.That's one of the reasons it needs to be programmed to remember all your settings.