EK has 1000 pilots today, needs 2100 in 2012.
today 550 captains, so lets say they need 1100 by 2012.
that means 550 upgrades in 8 years, then they will hire 150 DEC (thats what they said) so that makes 400 upgrades unless they hire more DEC.
EK has already 400 F/O's so if the last one is lucky, he will get his command 2012 (but I think they will take more DEC because its cheaper).
ps: dont forget all the local F/O's who will have the hours in the next few years, they will also be in front of the new joiners.