I found this interesting link explaining how boat sails work.
http://www.sailtheory.com/sail.html
There's good basic lift theory in the explanations and it's apparent that boat sails and wings work essentially the same way. Both Bernoulli and N3 are explained, and the relationship between them is explained in a fairly straight forward way. Coanda effect is also included and how it relates.
I found this explanation helpful enough to clear up the issue for me as to how all 3 "effects" contribute to lift, and how they relate to each other.
The sailboat guys seem to have a pretty good handle on this.
