What's taking 4.3 so long??

I am kinda getting tired of waiting for the Android 4.3 update.. I know it's not too big of an update, but it still is like a drop of water that could help me last until november-ish for 5.0

I know that ryan repeatedly stated that 4.3 is very stable and is about to be released.

The leaked 4.3 build of S4 GPE seems to be stable except for battery drain bug (high Android OS usage)

I hope ryan has more details to share soon!