I don't see much disagreement between the posts of evelove, kaw and kaplods. You are all essentially saying that it takes fewer calories to maintain a lower body weight than it does to maintain a higher one, and that to some extent (whether it is 15% or 30% is debatable) your metabolism becomes more efficient when you lose weight. Some of us here seem to be fortunate enough to be able to maintain a lower body weight at a calorie intake we're content with, and many of us (myself included) are stuck in a devil's bargain where we require fewer calories to maintain our new, desired lower body weight than we are content with eating. Those for whom the latter is true have a choice: either chronically eat an unhappy-making calorie intake or gain weight until your daily calorie burn matches your desired calorie intake.
Joyfulloser- I wish it were so! The latest research shows that a pound of muscle burns about 10 cal/DAY more than a pound of fat. The average woman weight lifter adds 4-8 pounds of muscle to hr frame. The difference in daily calorie burn is rounding error.
I tried raising my daily calorie consumption from 1300 (which once upon a time resulted in ~1 pound/week weight loss but for the last 2 months has been maintenance) to 1500 AND GAINED 2+ POUNDS IN 8 DAYS. It sucks so bad I have cried about it. I still haven't decided whether to accept the weight gain (and all the pounds that might follow) and stay at 1500 cal, or drop back to 1100 calories until I get back to 124 and then hope that 1300 cal will result in maintenance again, even though that isn't my ultimate weight goal either. I am unwilling to stay permanently at 1100-1200 cal/day in order to maintain at my truly desired goal weight of 118.
Like BrightAngel says, if 1400 cal/day is the average for all maintainers, then half (probably mostly younger and bigger/taller) are above that and HALF ARE BELOW.

) eat at that calorie level for the rest of my life. It's even easier when I think in terms of averages - some days I'm very satisfied with only 1100-1200 cals, so it makes the occasional push to 1800 or even 2000 cals possible. 

