Folks,
My spin on this issue: nil wind or steady wind - absolutely no relevance. Gusts invoke all sorts of rotor effects and are a different story.
If you enter a turn at constant body angle and torque, the tilting of the thrust vector into the turn will reduce the total lift and the aircraft will descend. I suspect that the introduction of cyclic pitch will induce a small element of flapback as well. If you wish to remain level, the total lift must be restored by increasing the thrust vector with collective pitch, which most certainly will induce some flapback. Left unattended, the body angle will increase and the airspeed will decrease. If you wish to maintain airspeed, then a compensatory reduction in body angle is required.
In my experience, different amounts of pitch reduction are required for left or right turns - I always presumed that the difference was a consequence of mast tilt and rigging issues.
Try as I might in some 5000 hours of instructing, I could never detect any effect that could be attributed to the wind whilst flying on instruments.
Stay Alive,