When that happens, results are never good. Or peeks, or reaches for a gun. The ducks catch the infraction, lift a wing and roll down range before anyone can react. In light wind, the same goofs can be overcome with quick reaction. Not so in a gale, when flapping wings make their exit at exponentially faster speed.
Guides often find themselves in a no-win situation.
If they call the shot too early, birds flare and disappear so quickly that reflexes less than lightning fast may not even shoulder the gun. Again, the birds flare. One way to offset slightly longer shots is to bump up shot sizes. With steel, it is wise under a stiff wind to shoot pellets one or two sizes larger than usual. If you like 4s for ducks, go to 2s.