I've had several iPhones and never had a problem synching all my calendars, but I just changed from an iPhone 4S to a iPhone 5 today and the only calendar that shows up on my iPhone Google Apps account is the one associated with my email. If I go to https://www.google.com/calendar/hosted/MYDOMAIN/iphoneselect it shows all five of my Google apps calendars and they're all checked. I save it again, but the other four calendars still don't display on my iPhone. Thanks for any help.
MacBook Air, OS X Mountain Lion, + 24-inch LED Cinema Display