Have you looked at MDL, every build has a page with lots of people replying, if you don't care then go find a thread that has your interest, can you understand this ?.
Where does it say mobile, the mobile 10549 just went out on the 14 and now it jumped to 572 in 6 day's.
I'm excited cause the last build was unstable. Not excited about having to roll back to windows phone 8.1