You don't need to get off the plane 1-3 minutes earlier. In fact I doubt it would even add up to that. The spread between the first passengers off and the last, non doddling passenger is rarely that long.

Families, friends, couples are not going to go for your rule that one of them should get off first and the other should wait for the entire rest of column to leave.

How about just trying to be more patient? Find something to distract you and those 1 - 3 minutes will be over in a moment.