I believe giving low level wind variations either on the atis or forecast can be very important not just to the big boys but also the lighties and even helicopters.
For instance at a certain time of the year in Malta, a runway headwind of 15 knots becomes a downwind of up to 40 knots at heights of 100 ft and above. Consequently those pilots familiar with these conditions generally do what looks like a downwind take off. It was often frightening to watch pilots going the other way.
