Overpitched
Windshear is what it says, the two bits of air moving in different directions at the same time. It's like jumping from the up elevator onto the down elevator - you will land on your ar*e. Nobody on this thread has suggested that turbulence, windshear etc will not affect you.
The question I think is being asked is, 'in a steady, non-turbulent horizontal air flow, will a turn downwind have any effect on the flying characteristics of the helicopter?' - The answer is 'No it won't!'
Cheers
TeeS