Yeah, this 24th vs. 25th thing really doesn't seem like much of an issue. I open on the night of the 24th which, after a large dinner and my parents going to church, lands around 9pm. Opening gifts takes about an hour and then we spend time judging each other's gift choices. By the time all arguments are resolved it's usually around 1am which is... the morning of the 25th, and perfectly within reason for everyone to start opening presents. Even if you're asleep and open presents around 7 (or whenever people get up) you still wouldn't hear from me until you got a chance to report your gift so ultimately everyone finds out around the same time.
The only exceptions are people living far to the west of me, and people who like staying awake to catch Santa in his rounds.