Go to google, ant type "Canon 50D review". You will then get reviews that list pros and cons and have full-sized sample images, not the resized, post-processed stuff you'd find here on CS.
what are you trying to ascertain by this? If you want to see whether the high ISO noise is good/tolerable/horrible, at least ask specifically for that kind of photo.
Even a 20D can take as good a picture as a 50D, i'm pretty sure of that. As Reportage says, a camera is only as good as its user.
Schumacher in a WRX would probably beat me in a Ferrari.