Rene Ritchie writing for iMore:

We’ve heard that Apple is getting ready to ditch the dock connector as it’s currently sized and implemented on iPods, iPhones, and iPads. The reason isn’t anything political, like a new desire to conform to an outdated micro-USB standard, but typically Apple: to save space inside the iPhone 5 for what are now more important components.

Rene doesn’t give any indication of where this information is coming from and the paragraph above appears to be all of what they’ve been told about the change.

It wouldn’t surprise me at all if Apple killed the dock connector, I actually called for its end nearly three years ago. And, ever since then there’s only been more reasons to get rid of it.