The Newtonian explanation often falls short in explaining how lift is created when the foil is at low or zero angle of attack. What I have read lately seems to explain things well. A properly shaped foil will impart a downwash even at zero angle of attack. There is some "suction" created by the low pressure. This has been measured in studies with sensors above a wing. However, one misconception is that the fluid MUST join the stream at the same speed aft of the foil. Many studies show that the flow continues to move downward or toward the HIGH pressure side for some time/distance past the aft edge of the foil.

This effect manifests itself as wake turbulence (not the vortices at the tip, but downwash), helicopter downwash, "ground effect" and even in sailing in the form of a "safe leeward" position which actually backwinds the boat behind and a bit upwind of the lead boat while sailing upwind.