Well, they announced 3 million sold through by the end of 2013 and 3.9 million shipped to retailers. Then no more sold through numbers from beginning of 2014 until now and still, no sold through numbers. If they were doing as well as they had hoped, you'd bet they would announce those sold through to consumers numbers. If you were MS and from Jan 2014 until April 2014, you only sold about 1-1.5 million to consumers, I don't think you'd want to announce that either.
Xbox One is keeping pace in the U.S but is being outsold about 2:1 worldwide.
If you take away the U.S sales, the rest of the world is at 4 million PS4s sold and 2.5 million Xbox Ones shipped but not all sold through to consumers. PS4 is available in more countries though and obviously price is a huge factor.