I think the attitude among drivers has improved over the past 40 years. I have had a couple 20 something boneheads yell at me in the past couple years,but that's nothing compared to what I experienced in the 70's. The hundreds of courteous, normal drivers we interact with each day make the few discourteous ones stick out as much as the careless cyclists. It's too bad we can't stick them all together in one spot to leave the rest of us alone.
Marc