I can think of more than a few places in the UK where the ATIS or local procedures request you call for engine start.
Scooter.
I switch the avionics off during start. I must check whether this is a recommended G1000 procedure and maybe it is just a case of old habits etc.,
(I appreciate this only isolates part of the avionics, and there is no alternative for those that remain on with the master on.)