I'm 6'1" and depending on if I exercise, I maintain my weight with about 1900 calories. I haven't met many people who have me beat with height and I doubt people shorter are going to need more calories than me.  If we talk exercise, that's a different story. But then again how many people are REALLY burning an extra 800 calories a day to justify eating over 2500? Even I'll admit to not needing that much every day, but I doubt fatties do more than me.