Through a lot of American Movies and TV shows, and also my personal experiences of interacting with people in America, I know that most White Americans are informed of their European ancestry, and are also able to locate the regions of their ancestry/descent (to a certain number of generations of which they are aware).
According to the U.S Census statistics, it seems that among all of the American population, German-Americans had the highest percentage, followed by the Irish-Americans and so on. Pardon me if I'm wrong, but I've also noticed that among all the White Americans, it seems that the English-Americans (Americans whose ancestry can be traced back to England) are the least vocal about their ethnicity? I think the U.S Census wasn't able to report an exact number of this as well. A lot of people I've interacted with make sure to explicitly specify that they're Irish, or Italian, or German and what not, but I still haven't met someone who said that he/she has English ancestry. So I was just curious to understand if/why this got phased out, considering they should logically be the community with the largest population in the U.S, and if there could possibly be any historical reasoning for this, or is it just me?