Actually, its not BS at all. Apple is consistently behind on upgrading their chipsets, their MOBOs, and ESPECIALLY their graphics cards.
Apple excels at using the latest in what the user directly experiences, and pushing their software to get the most out what the user doesnt directly experience. It is a fallacy that apple uses the latest technology though. Think about how long it took them to upgrade to i5/i7. Especially in their desktop models. Their laptop models might/are a different story because they realease updates so much more often than the desktop lines. But because apple doesnt tend to support the new chipsets until they release the new model, it means upgrading apples is a pain in the ass.
Who cares about BluRay? Well, depsite what you think, a lot of people still deal directly with discs. Apple has chosen not to support BluRay for whatever reason. It took apple a LONG time to accept that HDMI was something they had to support. The reality is when you buy apple (and i do, i have both apple and PC), you are buying into their vision of the future. They havent always been right. They were when it came to smartphones and tablets, they were wrong when it came to other things. When they are wrong it takes them a long time to admit it.
Also their hard drives are almost always substandard.