It might be that the post office couldn't sort through them quickly enough so some were left for the next day? I don't know where the fault lies :p
The point is, although they've said they shipped it out tuesday or whenever, they've stated that you will get it on the launch day and not sooner. So why should you expect it earlier than they promised it?
I'm not trying to defend GAME here because I don't like them myself but I think it's stupid when people whine about not getting games early like it's owed to them (not aimed at anyone in particular).
Also do the e-mails not say delivery takes 3-5 days?