just my HO rast, i would let the bees release her.
what apis said, older bees can be less accommodating. and a crap shoot overall introducing queens. also, a little syrup as apis mentioned.
i keep russians, i don't release queens, i use a slow release method. cork or cap on for 24 hours, take the cork out/cap off, check back in 4 days.
the other thing i do when requeening is place the cage on top the frames and watch the reaction of the bees. if it's not so good i leave the cork in/cap on for 24 hours. if they are fanning and not biting the cage, or trying to stick their butts in the cage to sting the queen (no aggression) i will remove the cork or cap.
russian queens are really hard to come by so why i am so careful about my release method, this may be different for you.