I can't speak for the past 7 years. My wife and I are back right now after a 7 year absence. We are both WDW vets and got married at Sunset Point at POLY. We both agree with OPs summary of the current situation. Our prior 2 trips in '08 and '09 in January were nothing like the crowds we have seen in the past 3 days. We both agree that we have not seen volume like this in years even during the Fall and Spring in the mid 90s and early 00's. Wait times have been crazy and the worst part is that the crowds are, for lack of a better term, rowdy. There is absolutely no 'decor', meaning, people will run you over to get to a certain place. I observed several times this evening CMs having to tell guests to not stand on railings during MSEP and Wishes. The only saving grace for the evening was that we were able to go to Trader Sam's when it was 21 and over. A welcome respite from the insanity.
The only night of the trip that was typical of the time was Sunday when is was 55 degrees and raining. We had packed gear for it and rode all the rides that night at AK and DHS because everyone else left. I spoke to another Vet tonight at CBR and he has told me that this is the new norm. I'm kinda bummed and it's not because I feel I want the place to myself. It's just that the people who are coming from off property are just so rude.
Times have seemed to change.
Things have certainly changed in 7 years! And for the better, from Disney's perspective, which is why they aren't offering so many discounts and bounceback deals any more.
From a guest's perspective, of course, it's not so good. The parks are more crowded, and the cms more stressed. On the plus side, though, more money for Disney means more money going into expansions and renewal projects, such as Star Wars land and Avatar, etc.
And from a purely intellectual point of view, it's amazing the pioneering work Disney has been doing in the area of crowd control and guest management.
By the way, the word you want is "decorum". Decor is the word you use to describe the Disney princess theme you've got going in your living room. Decorum describes the behaviour you expect from your guests, so that they don't go knocking your ceramic princesses down and smashing them to pieces. ("Um, can you show some decorUM?")
Also, I'm curious, too...? How can you tell which of the rude people are from off property and which aren't?