No, its all just speculation and conjecture.
The best advice you can follow is if you need a computer now, buy it. If you don't, don't.
The bottom line is wait.
Even if you don't want the new chips. Newer models drive down the prices of the previous generations. When you're this close to getting an update, it's stupid to buy.
Nobody really needs Christmas presents, it's a luxury that Apple is banking on for sales. After the new year, when sales cool off, there will be a new macbook.