Here's one of the first shots I took with my new T2i. First thing I noticed about these shots is how much better low light shots are coming out, compared to my Rebel XT. It's a - ahem - night and day difference. This was I think the 5th shot I took with the camera, after having charged the battery and played with the settings a bit. I was amazed by how good by direct comparison the T2i's pictures were. It's a HUGE difference from the XT.
I wasn't going for photographic awesomeness, I was just screwing around and caught my dog with a funny expression. The camera just did a really good job of capturing it. This is the kit 18-55 IS lens.