Jal's posting is another cut and paste from other forums. Who knows whose opinions these are originally. That is unfortunate as it casts a bad light on the information being presented. I think it is better to give some personal statements instead.
CAIR, the Council of America for Islamic Relations, did a survey of mosque attendence and practices:
here. The survey is terrible about statistical analysis. For example, the survey itself was done by randomly selecting about half of the responses. A better statistic would come from just counting up all the responses, wouldn't it? The often genenerate new numbers by multiplying average percentages by population numbers again.
The majority of converts across America are "African-American" (I don't think any ethnic category is accurate), but this might be due to a large number of people either migrating from Nation of Islam, (which is different -- they have spacecrafts and evil scientists), to mainstream Islam. In my experience, I have seen many more "Anglo-Saxon" women converts than men. All of the ones I know wear a headscarf, but aren't required to. Talking to them, it is hard to qualify the reason for wearing it. I've come to the conclusion that it gives them a sense of security and identity in very stressful situations. I knew one Muslim woman, (in another country), who started wearing a headscarf after her mentor, (she has a Ph.D. in microbotony), died and she sufferred an illness herself. She made a complete turn from someone who didn't even know how to tie one to someone who wears it at all times in public. There is a sense of control, too. Most Americans think the headscarf is forced on Muslim women, but that is a generalization. It is true that many Muslim countries have insitutions that enforce it for Muslim women. But that doesn't exist at all in America. In fact, if a woman chooses to wear a headscarf, no person in the world has the authority to tell her not to wear it. In the past 2 years, Muslim women in America have sufferred even more than before. I've heard them mention Americans who shout threats out of their cars as they walk along the streets or teachers and businesses who treat them with more disdain than usual.