There's nothing that says that two air particles that start together at the front edge of the wing and split up have to arrive at the tail edge of the wing at t

There's nothing that says that two air particles that start together at the front edge of the wing and split up have to arrive at the tail edge of the wing at the same time. Exactly. This is one of the fallacies that are explained in the best reference I know about this subject: http://www.av8n.com/how/ http://www.av8n.com/how/ It's even illustrated in the title picture... ;-)