I've been thinking the same thing... I go to boarding school so our results are emailed to us (at 6am, the poor head of exams) so maybe a similar system will happen at other schools? The only other thing I can think of is that they post them but this seems highly unlikely as so much could go wrong there! Otherwise, they might stagger people coming in, but that seems very, very unfair.
I guess we'll have to wait and see!