Originally Posted by mattdm 
Do you really think Canon or Nikon would pull ads if the magazine said too nice of things about the competition? something nice to say about everything.
Unfortunately, the pulling of ad revenue has been done by Canon...recently as a matter of fact in...I believe... in a French photography publication. It may not have been so much for glowing issues on a competitior as much as a lack of a glowing review on Canon equipment itself.
I have not viewed all the post yet in this thread. But, of note to me is that this is the second review in a row posted on this forum, wherein, a reviewer finished off a review of a Pentax camera /lens and suggested purchasing a 1) cheap Canon DSLR and 2) a cheaper competitiors lens. Now... do you think that type of nonsense would ever follow a review of a top Nikon or Canon DSLR. Though I might be wrong I highly doubt that such would happen.
Early in my career I was an advertising photographer and I don't think that ad money talks any differently now than it did then.
Stephen