EDIT: Sorry Umbran, I hadn't read your post yet. If you wish I can edit my post.
I DM 4e and play in a Pathfinder game. I like them both, they each have their own flavor of both awesomesauce and poopstink. No game is perfect for everyone.
I just watched the ad again and I have to admit, unless the 4e naysayers were posting the kind of stuff that the internet troll in the ad was representing, there really is no reason to get offended. They were NOT satirizing a reasonable discussion about the positives and negatives of 4e or 3.x, they were saying that the vitriol spewing nerd-rage rants (and there certainly were some) didn't matter to them.
They also satirized and poked fun at mindless 4e fanbois too.
It came across as selective criticism and looked like people searching for more reasons to be even angrier about the release of 4e and subsequent end of support to their game.
Were any role-playing farmers offended that one of their kind got pooped on? I didn't see any posts about that.
But I do recall posts where people compared the release of 4e to killing their dog and rape. I did not see any posts from the 4e camp that did a similar thing.
Part of the problem has to do with reading the WotC forums at the time. (Yes, I used to visit the WotC forums.

) There was a tendency on the boards for critics to be broadly painted as trolls by game designers as well as some of the fans that put the fan in fanatic. One such was on the subject of multiclassing, of all things.
I will say that for the most part the mods of the boards seemed pretty willing to delete posts by either side, but it was pretty heated, and not all of the deleted posts were all that inflammatory, and some were just questioning. It may be that they were trying to head off flame storms before they began, but the effect was an apparent stifling of any questioning of what WotC was doing.
So, some folks, myself included, made the not exactly great leap that the stupid ad was targeting all critics, not just the actual trolls, because the mods and designers seemed to be doing exactly that on the official WotC boards.
That it was not just the nerd rants, but also all criticism.
In all, adding the silly ad was pouring oil on troubled waters, then lighting it on fire. In retrospect it was an attempt to be funny. At the time... not so much.
If you are enjoying both games then good for you - I suspect that you fall into the range between the two warring camps, a territory that I think is larger than the other two combined.
*EDIT* I don't think that I have ever accused WotC of much more than blind arrogance. But I'll hide my dog, just in case.... (Actually, I just wanted to note that I have removed part of the subject post as offensive beyond the call of, ummm, duty.)
The Auld Grump, who doesn't even
have a dog.