It's interesting to see that even with the proliferation of satellites these days, there are only about a dozen above the continental United States right now, with all the categories selected.
Makes sense - the contiguous US is only 1.58% of the earth's surface area. 1.58% of 2271 satellites in orbit = 35 satellites, and considering how many orbits are equatorial, 12 feels well within the expected variance to me.