Ive done it and the car has better driveability hands down, also does not go rich when backing off the throttle at high boost, since it doesnt see a false flow of air as the pressure in the intake tract blows back through the turbocharger in the old "sneeze" that we know them for. It removes a minor restriction from the inlet of the turbo, and quickens throttle response/gives more accurate MAF readings since its located closer to the engine. I say if you have a front mount or larger intercooler than factory, and plan to drive the car alot or race it frequently, try it out, you may just like how it runs.
For reference most vehicles produced today have the MAF sensor within one to two feet of the throttle valve. This gives them an a timely, accurate response to the change in airflow when user inputs change. On a stock turbo regal the MAF has about a 5 to 6 foot column of air ahead of it before the throttle valve, causing a lag in response when the throttle is slammed open. If and when larger intercoolers, pipes, etc are installed this air column or distance between the sensor and the throttle increase in volume drastically, causing the problem to become more noticeable.
I still have 2 - 3 feet of plumbing between my MAF sensor and my throttle valve, but its far better performance wise than it is with 8-10 feet of intercooler, turbocharger, and associated pluming between them. Runs smoother all around.