The others are correct. Early morning rush hour and remote stands could complicate things but given by the amount of times flights are held for connecting pax, you will probably be fine.
Once the new A380 concourse opens (first quarter 2013 they're saying at the moment) that should free up some gates when the A380's move over to their new spot.
Dubai World/Al Maktoum isn't opening to pax flights for a few more years now I thought, except for maybe FlyDubai/Air Arabia. Seems to be changing often. Some cargo and private flights already operate out of there, but unless they extend the metro it will be a PITA to get there in my opinion... not good for the locos....