During long rides I may have broad soreness in my shoulders (sometimes other parts too). I attribute it to not riding enough. To put it in perspective, I ride 2-3 couple of times a week, including a 2-3 hour ride. My butt is fine after the long ride. My wife riders for 30 minutes and is sore all over. If she road for as long as me would she still suffer after a 30 minute ride. Probably not.

My shoulder soreness goes away after 10 minutes of not riding. I think it helps to clarify the level of pain. If it hurts days after being off the bike, I would call that a 8-10. Mine is a 2-3 (less than an hour after riding, and never acute pain that makes my cringe).