If you live close to an Apple Store, I suggest trying for a pickup reservation at apple.com -- you could get one tomorrow or Monday if you time it out right.
If not, well, the stores apparently don't have pluses in stock yet, dunno when they will.
I've heard reports of shipments being sent up to the 13th so far. The sooner you order, the sooner you'll get it but from what I'm hearing the 4-6 weeks thing is extreme highballing.
I ordered mine on the 16th and am hoping to hear something next week. We'll see.
Sent from my iPhone 5 running iOS 8.0 while impatiently waiting for my 6+ using Tapatalk