I was playing my legal copy of Assassin's Creed II for PC during the time period stated, in the area supposedly affected, and had no problems whatsoever.
My internet connection isn't particularly good, and cuts out at times, yet I've still had no problems with the game. If my connection cuts out, the game pauses itself and I wait for it to reconnect, or I can load up my last save (usually about 5 seconds ago since it autosaves so often) and continue playing offline to be re-synchronized with the Ubisoft server when the connection is re-established.
Yes it is a little annoying that I have to be connected to the internet to play a single-player game, but I think you're all making way too big a deal out of this. Steam does the same thing after all.