Actually JW hit it, (quicker than most, I might add) Theres more geese on one side. That simple, That is all that matters. The actual reason may well be aerodynamics or upwind/downwind. But who cares? Does it matter from 10, 000 feet? nope, lol.
I think in the long and short of it we are all guilty of over analyzing what is not important, that is the piont of todays exercize, lol.
Ray