Doug:
I believe it is because the BRP dealer network in the USA is so weak. There are some very strong dealers situated throughout the country but in some areas we have owners who are 50 to 100 miles away from their nearest dealer. In other areas we have multiple dealers but experiences of buyers (and others), have driven owners away from them if problems develop that aren't handled quickly, correctly or, handled at all.
To my knowledge there are no BRP company stores and I don't believe there are any dealers who handle the BRP line exclusively. So it isn't like visiting your local Ford or Chevy dealer for some satisfaction where the dealer and product are closely aligned. Most BRP dealers (with some notable exceptions) can do quite well on their Hondas, Yamahas, Suzukis, Victorys and Triumphs and kind of treat the Can Am products as a small add-on that can become a PITA if something goes wrong.
I suspect that dealers sometimes have as much difficulty in dealing with BRP as some of the frustrated owners that post stuff on SpyderLovers do.
In my case, I think my dealer (Mountain Motorsports) is great. I have purchased seven motorcycles/ATVs from them including three Spyders. My dealings with BRP have also been excellent. I had problems with my 2011 RT that were handled well by Carlo Viola when he was with them and then later by Chrystelle LaChance. Based on my experiences I am amazed at some of the stuff that has happened to folks that I read about on this site.