I got a Samsung epic two days ago and yesterday I started experiencing bad lag which I thought was suppose to be normal. After awhile I realized that the phone wasn't lagging but the screen wasn't recognizing that I was touching it. I took it back and got a new one from best buy mobile( Those guys are the greatest), and now I can actually use swype again. When I was talking to the guy he said that the epics in general have been really flawless in their operation and have a low percentage of returns. Has anyone had responsiveness issues with their epic?