Having been trained by the RAF at a very early stage to fly IMC on unstabilised helicopters I am of the opinion that an immediate 180 degree turn in IMC is far from a good idea. Very conducive to the leans and loss of control may quickly result, especially when the adrenaline kicks in and causes overcontrolling.
Controlling the aircraft in a wings level, speed stable attitude and then descending in a straight line by positively lowering the collective is far easier and less likely to lead to spatial disorientation. This technique has certainly saved my bacon on a few occasions.
Obviously, it cannot be used if an obstruction or terrain is an issue so experience has taught me to keep an escape route in mind whenever the weather is marginal. Sometimes that escape route involves not taking off in the first place, despite me being IR trained and flying a well equipped single pilot IFR machine. If in doubt, chicken out!