Nice to finally see some common sense (Lownverted, cfircav8r, M3Baker) to name a few.
Exactly: Once airborne a fixed wing airplane does not recognise a moving air mass - period. Other phenomena such as turbulence caused by gusts, mountain waves, microbursts are rapid and sudden changes and the effects are obvious.
However, for those who have flown Helicopters (rotor wings), will know that the wind does have an effect once airborne, and below transitional lift.