Just got back into Sins again a week ago, so i dont know what been going on lag-wise...or really anything-wise. A friend and I just like to do a large map, one sun very very few mods and we have had nothing but terrible lag. Overall its not really THAT bad, but the game freezing up for a random 5-30 seconds in at least as many minutes is maddening. First time ive ever lagged with the game too. Not once when I played before did i ever have an issue, not even on maps with 5+ suns and more then just me and my friend and 2 comps.
Just had to chime in my 2 cents. Would love to see some more info from the Sins people about this, I've gone crazy fiddling with routers and whatnot for the last week. I'm also going to highly highly doubt that my being in Boston has anything to do with the amount of lag I'm experiencing.