RE: Induced Drag
I suppose it depends on what you consider induced and certainly tip votex drag is part of the cost of making lift with any real airplane but I always saw induced drag as specifically being related to the airfoils profile drag only and that is what the coefficient of drag for an airfoil was all about hence the link in the performance charts between the lift and draf coefficients (Cl and Cd). Adding in the tip losses is raising the bar to analyse specific wing shapes along with the airfoil. After all the wing's overall performance depends on many factors. Not just aspect ratio, which IS the biggie, but also it depends on wing tip shape and fuselage interaction and a host of other things that are not related to the airfoil's possible performance.
Ah, maybe I'm just caught up in the semantics thing....