<20 secs for SR to boot to dab radio, allowing for splash screen to time out. No telematics.
So maybe the maps of the EX take longer to boot up time, as perhaps telematics.
Booting to android phone is only a few secs, and to iPhone seemed v quick.
20 secs is a quick as you can expect something to boot up - phone, smart tv, tv dongle would all be longer so unless other cars auto wake their system when you plip the locks, or get a radio from the 90s