So, with passes that used location awareness, is it the same as the Reminders app's geofencing, in which it only checks every 5min or whatever?
Actually, I assume not, since I added the Starbucks pass, and it doesn't show the empty location services icon in the status bar...there's like no info on this feature, really.
It doesn't geofence. It checks your current location and checks it against the location of your saved Starbucks locations. If you're near one of them, then Passbook will prompt you to open it and display your Starbucks card.