Nobody knows what 4.4 is about, nobody has much clue about GN3 performance till we start using it, and we have a thread about 4.4 on GN3. I couldn't care less about version of android as long as the phone works perfectly.
If someone is really fussed about 4.4, here's some facts:
It will take time to come to GN3, because note-series is not about latest android. It's about all proprietary stuffs stuffed into the handset.
If you want 4.4 at the earliest, get a Nexus - end of discussion.
You won't get 4.4 on GN3 for probably 4-5 months after release. You know this very well, infact everyone knows that. What more you would want to discuss here is a mystery to me. If I am totally honest here, there is nothing to discuss on this topic.
Everybody knows how this (update scenario) works, yet we spend countless time in unconstructive debate.