The problem that I see here is that Ubisoft already got their money for all these copies of Assasin's Creed II (and whatever else might be running it). Thus they probably don't see any problem with what's going on since gamers always gripe about stuff like servers going down.
Really they won't get a clear message until they release a big product, promote it heavily, and then take a bath because of DRM. Until then like all companies they will simply view it as impotent nerd rage. They are pretty much banking on the fact that in the final equasion we, the gamers, are going to stomach the inconveinence and respond with nothing but words.
Truthfully, given how things have normally gone with the gamer consumer base, their attitude is probably not unfounded. As a group, gamers make noise, but almost always wind up taking whatever the companies want to dish out. People cried about the lack of dedicated servers for "Modern Warfare 2" for example, and it caused problems apparently, but in the end it was a record shattering game, IW has no real reason to even consider what even a lot of gamers say at this point, nor do most other companies who have seen things like that happen time and again.
