i think that the media tends to over exaggerate because homosexuality automatically equals sex. all that they talk about is the sex, not the relationship behind it. so, therefore, we are hornier because its all about the sex.
for myself, what is normal for me, may be too much or too less for you. i mean is it 2-3 times a week, is it more or less. i guess it just depends on the relationship and i tend to think our sexual relationships are very similar to hetero relationships in that aspect. it depends on the two partners involved.
as far as promiscuity, the media likes that hype. just like the news coverage when there are gay pride parades. they tend to show the drag queens and not the average looking couples so they can exploit the outrageousness of it.