Research suggests that stretching does not affect soreness or risk of injury during exercise.~NY Times
According to at least two studies reported on in by the New York Times, stretching is not as beneficial as it has been thought. It does not lesson the chance of injury during activity. Stretching does not decrease the amount of soreness one might feel after a difficult workout.
The reason I am so happy about this is I never stretch, and I always get yelled at for it, whether by my boyfriend, my roommate, or my mother I always get told: "If you had stretched you wouldn't be sore right now." Well HA! I would be sore anyways!