As a fellow Boss attendee tomorrow, aye, he will be onstage 6.30 sharp seemingly. Makes sense if they want to chuck out at 10.
I think for the pit thing you have to be there really early and check in repeatedly throughout the day to prove you're really waiting. A couple of folk I know were at the Dublin gig and that's the system they had anyway, they had to check in at half 12 and half 4 and basically spend the rest of the day hanging around Croke Park.
You ask me, for a three and a half hour seat, I'd be queuing for a seat, nae a standing space.