I kind of noticed that too, even though the only thing I owned by Dsquared2 was an incredibly cheesy and ridiculously fashion-victimy T-shirt with a giant Dsquared2 logo printed on the front chest, which was a gift from a good friend. Since there's almost no one around me in this mid-west town knowing anything about them, I have been wearing this T-shirt a lot, I mean for more than 5 years. It's still in perfect shape right now. I also kept hearing stories about the good fitting and nice tailoring of their clothes. Right now, YOOX has lots of previous seasons stuff from them, and if you take a close look at the pictures on YOOX, some of the items indeed look like well-thought and well-constructed, and also very very easy to wear. I guess that does explain why they have been around for a while and their business seems to be in quite decent shape, no matter what kinds of embarassingly cheesy runway shows they put up season after season.
I am actually quite tempted to get one or two pieces of Dsqaured2 on YOOX once they start their final mark-down for the Spring and Summer stuff.