I think 5 years plus is realistic.....however, this needs to be placed into context. We are currently in a climate where, I believe, many airlines are laying off pilots.....and downgrading captains to F/O. Given this, the fact that EK is still doing 50 - 100 upgrades a years is a positive thing.
Bottom line is that EK is still a good prospect for quicker upgrades than most other carriers....DEC or no DEC