Wonder if it's just law of averages. Seems there are more male than female cyclists, therefore the proportion of drivers who are also cyclists are inclined to be males and give cyclists more consideration when they are driving. I am female and also give cyclists plenty of room and consideration but that is maybe more due to the fact that I cycle myself.
I think there's a lot of truth in this. There is a gap in understanding between cyclists and motorists. Almost all cyclists drive or have driven but a lot of motorists don't cycle and I think it's the ones that don't that are the problem.
I have always had Audis but despite that I have always thought that most Audi and BMW drivers are prats that drive too fast and too aggressively. So when I started cycling I feared them the most but I soon learned I was completely mistaken. Cycling in rush hour is a pleasure, I do it most nights after I get back from work. The big saloons pass me fast but very wide. Perhaps this is because big German saloons are mostly owned by men in their 30s-50s which is pretty much the main demographic for cyclists.
As it turns out, my biggest nightmare is women in hatchbacks and 4x4s, followed by white van drivers. Just today I went out for a 15 mile ride and got cut up by two women in small French/Japanese cars and a white van person. I just went out for a quick 5 miles to test something tonight and like always at 5-7pm, I had no problems despite the greatly increased traffic.
This may be different from other people's experiences, particularly those who cycle in towns and cities but for me cycling exclusively around country lanes, the school run is the hellish time to be avoided at all costs.