Also, the potential recruits don't see the dance from overhead the way we diagram it. They attend from the side. Recent work shows that the dance conveys distance information quite accurately. The energy expended during the outward flight of the forager determines the dance. Greater distances, the slower the rate of dancing.
Headwinds require more effort to get to the source, therefore the bees dance slower.
Tail winds, just the opposite. If you add weights to the forager, it will dance slower for a given distance. If you make it walk, it will estimate that the distance is too far. Only the waggle dance conveys information concerning the direction that a recruit must fly to get to a food source. A forager on the way to the food source notes the angle between the azimuth of the sun, the hive, and the food source.