[f4780y]

I can typically complete a remote 3D view in around 60 seconds here in the UK, but occasionally longer - there can be many factors which will impact how long it takes, not least of which is the wireless service which the car happens to be connected to at the time you make the request (something you have zero control over).
Connected Drive isn't excessively slow, but at the end of the day you are doing a "secure" communication with your car over multiple networks, some of which BMW can't necessarily predict or control.