If it's that high, we are real in serious trouble. Especially if a sweeping amnesty goes through. By the time their relatives, and their relatives relatives get in, we'll have a half million. And this in my lifetime.
I am willing to bet that the population of Mexicans in my one town has more than tripled. So I will stick to my guess of at least 30 million illegals here + the 11 million friends and family of the ones about to receive amnesty for a grand total of 41 million.
Of course this may not show up on the next Census, as most of these folks don't do Census. But they sure show up when your sitting at a red light checking out who is in the cars driving by, or at the mall, the movies, the grocery store, etc.