3-Years ago, I traded my Digital Rebel in and bought my Canon 20D. Since then I had never been very satisfied with my 20D's low light performance (even relative to my Rebel). The pictures mostly came out very dark. My friends who have rebel or entry Nikon DSLR's pull in great shots.
I thought it was my lens and went through a series of lens changes and I currently have the Canon 17-85, 2.8 Lens. Even after having a 2.8 lens, if my shots are dark, I am starting to wonder if the 20D is not a good camera.
Now, I am using exposure compensation or high ISO 1600 to get good shots.
Anything else that I am doing wrong or is 20D known for mediocre performance in low light?