Android using the Linux kernel doesn't make it a Linux distro any more than Linux using GNU code in its userland makes Linux the GNU operating system. (Or put another way, nobody thinks that iOS is "the most widely used BSD.")
>Android using the Linux kernel doesn't make it a Linux distro any more than...
Um, actually that's exactly what makes it a Linux distro. That's the one defining feature of a Linux distro.
Well, iOS uses the XNU kernel which has Mach as its basis, not BSD. It uses a lot of parts of the FreeBSD kernel, though, but it's definitely not tracking upstream FreeBSD the same way that Android is.