So as I have mentioned in other threads, people who are completely unaware that the Intel transition ever happened see only a cheap Mac. They may wonder why it looks a little different then the newer Macs but they still assume they are getting something that can run Mountain Lion. Then they find out everything we have to tell them and they aren't happy. Because they did not do their research, because they believe they were fooled and because they made a wrong decision. People will do almost anything to avoid admitting they were wrong. Admitting it to yourself is often the most difficult. Add in the PC lens as mentioned above and you have uninformed users who would rather blame the product then their bad decision.
This reminds me of something I've seen on eBay, Kijiji and Craigslist that really bothers me; people trying to pass off their iBooks and PowerBooks as "MacBooks", especially the later aluminum PowerBook G4s. Your later point has also made me wonder if this also extends to early Intel Macs too; people snap up a cheap 2006 MacBook but don't realize that they're limited to either Lion or Snow Leopard.