Did you get a salary increase as well? And if so, would they decrease your salary if you go back to IC? If you keep your salary increase, that's a good deal.
If there was no salary increase -> that wasn't a promotion!
If they decrease your pay -> find another job
Did you get a salary increase as well? And if so, would they decrease your salary if you go back to IC? If you keep your salary increase, that's a good deal. If there was no salary increase -> that wasn't a promotion! If they decrease your pay -> find another job