It's not a
rumored start of the season - 11/12/10 is, indeed, the start of the holiday season this year, according to Disney Destinations. (Unless DLR suddenly changes their plans, of course.)
In addition to the November thread (which is a meet-up thread for 2010 only), I would suggest that you also join the "
Disney at Christmas" thread (which is the ongoing, year-round holiday thread), as we discuss the entire season, from November - January and everything ranging from crowds to food to events to attractions, etc.
I think it is going to be quite busy that week no matter what, from Wednesday on. The fact that Veterans Day and the start of the holiday season fall in the same week means that people will probably take extended vacations that last from Veterans Day through the weekend. It may help a little that SoCal AP holders are blocked, but some of the busiest crowds at DLR (like the week between Christmas and New Year's) have nothing at all to do with SoCal AP holders. It's simply that holiday periods attract tourists and vacationers.
The starts of holiday seasons are always busy because it's a novelty. Case in point - the Halloween season just began this past Friday and reports have already come in, telling us that it was quite busy on Friday afternoon and into the weekend. Late September is usually not as bad as October in terms of crowds, but when a season starts, people come out! But it will probably quiet down this week a little bit.