Banktoturn,

I got out Simon's book and looked at his drag budget illustration again. You are right about Simon's drag budget illustration. It does cover turns.

At the turn end of the pylon racer example, the induced drag is only about 1/3 of the total drag. If you extend the arrow for the pylon racer just a very small distance to the left, the induced drag as percentage of the total pylon racer drag goes up dramatically. It just means that you better not turn too tightly and the lower the aspect ratio, the wider you better make your turns. If the low drag bucket of the airfoil was chosen for a coefficient of lift range associated with a high aspect ratio, tight turning flying style and you chop the wing tips, the best flying style will be wider turns which lengthen the course and eat up at least part and maybe all of the speed advantage. Also, the ideal coefficient of lift range of the airfoil will be shifted to lower values and the old airfoil will no longer be quite as effective.