its true… one reason the factory put the re-circ valve on the hotside.
why people want it on the coldside/close to the TB is beyond me… when you let off the gas and the TB closes, pressure will bounce off the throttle plate and back to the turbo. Dumping the pressure close to the TB doesnt dump any of the pressure on the other side of the system near the turbo so there for, its all going to go into the compressor and stall the fan slightly etc…
but if its as close to the turbo as possible then it will dump/vent all the pressure on that side instead of it bouncing back into the turbo…