Is that entirely the case? I know it's been a few years since I last changed phones, but when I went from having a Moto KRZR that had a micro USB charging cable to a Samsung WinMo phone, it had a completely proprietary looking data/charging port on it. Then within about a year, that Samsung phone had major issues and I got replaced by VZW with a HTC Touch Pro 2 (my current phone), which as it's own, different proprietary looking data/charging port on it. Smaller than the Samsung (though it was all that big either), but the port/cable on my HTC looks about the same size/style as a micro USB, encept that one of the sides is squared off instead of fully having that trapezoidal look to it that micro USB does. Would certainly be nice if micro USB has in fact become much more standardized....really annoying having to buy new extra charging/data cables and car charging cables each time you change phone brand!!!
I do love that most of them almost universally have the normal sized USB connection on the other end that can be used with any USB wall or vehicle adapter!