Well, who is changing the goalposts now??  The ratings at 6am with or without the cancon would still be the least listened to part of the morning.   Nobody said anything about four cancon cuts lowering the ratings early morning.  What is absurd is to argue that playing one Canadian song less per hour on a Saturday afternoon makes any difference or creates less damage.  Since you earlier agreed that the listener wouldn't notice, then how could it be less damaging, or how could BOOM listeners enjoy the station any less?  This cancon shuffle is totally a radio management thing that makes them feel better and more in charge, but to the people that matter...it appears not to...  matter. 

I wasn't referring to any of the professionals at Boom.  I like the station and think it is well programmed.

 We used Boom as the example of stacking of cancon and my point has been that I have doubts it actually makes any difference since we are talking about only a few songs.  So far you haven't given any reason for me to change my mind other some vague references about stacking being a proven method that is used throughout the industry.

Great that the most consistently #1 station  has data on their listeners and does extensive music research.  But they also know that music is just one part of the reason they are #1.  Just as important is everything else that they are doing that makes them a great radio station.  Every #1 station has a competitor that plays the same music and wants the same audience.  It is also everything else that they are doing that helps to keep them consistently #1.