We go down the same week every year. Now it is definitly busier now then it was 10 years ago. With that being said, we still have never waited more then 20 minutes for anything, (having a plan helps with this.) the crowds are not bad. There is no reason to think this year is going to be any different. I know people are talking about hotel crowd levels, but that is NO way to gage crowds at the parks, I also know that some people got a pin code offer for free dining for that week, HOWEVER most people (the general public) didnt get the free dining this year. If anything I have read of people moving there trip dates to free dining dates. That should help a little.
To add to my case, If it helps any, "Touring Plans" crowd levels for that week are:
(Touring plans use a scale of 1 to 10, with a 10 being the busiest days of the year. i.e. Thanksgiving week Wed. until Sat is at 10 everyday)
12/2: 3
12/3: 1
12/4: 2
12/5: 2
12/6: 3
12/7: 6
12/8: 2
12/9: 2
I can also tell you that they had pretty much the same numbers for last year.
I for one, am not worried about the crowds, MB's working and FB+ working, now that is a different subject. But the crowds will be the same as the crowds are every year during that week.
Have a great trip, maybe we'll see you down there.