Aerodynamic effect of drafter to the draftee I thought I read somewhere something like having someone drafting behind also has effect to the rider in front. I wonder if it's true and would like to understand how does it work because it's quite unintuitive (if it's true at all).

So, other than robbing the rider in front from tailwind, does the drafter help at all?
When you are riding along on your own you're not only pushing the air in front of you out of the way, the most obvious source of air resistance, but you're also being slowed by the turbulent air behind you. However slightly.

Surprisingly, having someone draft you will help smooth out that turbulence, and so you benefit as well! ( Just make sure they take their turn in front ).

http://www.exploratorium.edu/cycling/aerodynamics2.html