to state the obvious here: did anyone's game FREEZE when it says in the top left "simcity servers are down, attempting to reconnect"? Mine didn't. kept playing smoothly, updated my roads, added buildings, etc, etc... Things that you might expect to require 'recalculation' for the purposes of the simulation such as new traffic flows or whatever. but no, my game carried on fine.
All that's really being sent in my opinion is a constant stream of data for the sake of regional play and cloud saves. i have to admit i'm impressed by how infrequent i have to sync my city before i quit, implying constant update of my cloud saves.
I think this is evidence against the rubbish of "you need our servers to play the game" Everyone go google "PANDA CERN" - that's the sort of thing you would need to handle what they're talking about. (ok, not AS big as PANDA, but you get the idea, a MASSIVE server farm).
And, this would imply the speed of your game is linked to the speed of your internet, heading towards bigger cities. The lag that i can get when playing, say, Call of Duty whilst at the same time downloading a steam game doesn't seem to happen with simcity when i update my steam library.
And finally, as others have said, 10 years down the line when they turn off the servers, that would make the game unplayable and would warrant refunds? a product you have paid for stops working, if its not addressed in any terms and conditions, that's false sales of a product, yes? This hints to me their is a hotfix for offline play otherwise it breaks the law somewhere down the line, right? Which implies to me that EA and Maxis are sticking to their guns as to not appear weak and lose the one thing game companies currently have as a true challenge to piracy. They want to make always online DRM work because they haven't got anything else to take its place.