How much Islam is there in US that you notice?

More than ever before.

Our area has a large Muslim population, and I had two who worked for me. I even went to a Muslim funeral when the father of one of my staff died. There is only one obvious Muslim family in our neighborhood. I have no idea how common that is across the U.S.

Our small American town near the Canada border has two Iraqi mosques, one Gambian mosque, and an Afghani mosque.
You're doing social engineering! Without caring to admit you're doing it.