Another SNG Theory Question

[BradleyT]

Obviously more chips and slower blinds makes the game more skill involved. This definately increases your expected ROI if you're a strong player. However this also increases the ROI of your strong opponenents and causes the time/value of the SnG to decrease. It now might take an hour and 25 minutes to finish whereas before it took 42 minutes. Is a gain of 10% ROI worth doubling the amount of time it takes to play?