I disagree with that, at least with respect to Rogers and Bell. With three products -- cable TV, internet and home phone -- I get 10% off the entire bill. Comparing apples to apples -- quoted rates for products, not discounted specials -- my internet is the same rate; my phone is cheaper; my tv product considerably richer for the same price range. Then I get 10% off that. If I had wireless, I'd get another 5% off TV and Internet and home phone as well as 15% off wireless.
The extra dollar bills stuffed into my pocket are more than "perception".
Further, I don't have to "do anything" to get the savings other than "enrol" with a phone call. If I change my mind on the two year agreement for the savings, the worst I pay is the discounts saved; there is no "penalty". Since I fully expect to subscribe to TV, Internet and home phone without interuption over the course of the next two years, I'm happy to take the savings and run.
On the larger point, I fully agree that early users pay more and get the benefits of the service longer. HD is a good example: the sets were more expensive two years ago; but then I've enjoyed HD TV for two years longer than someone starting now. I don't expect Sony/Bell/Rogers to "refund" me the difference in TV sets purchased today vs. two years ago.