If there are two water fountains side-by-side, the lower one predominantly has a more powerful stream and often gives colder water. I'm not sure why this is, although I suspect it has something to do with physics. It would make intuitive sense that if the water has to travel farther up against gravity to reach the higher water fountain, then it would be more difficult to achieve the same strength of the stream.
Now normally I might not care too much (especially considering that I'm not all that tall), but with all of these ostensibly respectable economists calling for a tall tax, I thought I would point out that it's not all gravy to be above 6'2" or so. Sometimes, when I have to bend down, it hurts my knees.