I remember a guy with a Canon (not sure if it was 50d or 500d - it wasn't a very high end model) talking rubbish about Nikon, namely that "all professionals only use Canon". The guy likes the brag to impress girls around half his age, and I do suspect that.. it worked. He is a good speaker and very assertive, and given that Japanese culture does not lend towards questioning people who are more senior, and given that most people in the group have never touched a DSLR, I wouldn't be surprised at all if some people would believe his words to be true.
But the thing is that as tech enthusiasts we've spent more time reading about and playing with various electronics "toys" to form are own opinions. Spending so much time investigating puts us in a better position to know that brand A make great top end products but questionable lower end products. But with every company making so many products, and the absence of really it is unlikely that anyone is an "expert" on every products. I, for one, know hardly anything about cars. If you were to give me £30k and tell me that I have 10 minutes to spend it on a car or I lose it, I will most likely a German or Japanese brand I recognise, or ask a person I deem to know more than I do (just about anyone) even though said person may or may not be as knowledgeable / impartial as I'd like. Well, to be fair, I think that something like a car would value some research before splashing on. But sometime I wonder if it is worth spending time researching on almost everything I buy. I can't blame people who have better things to do than to worry about paying 30% more for 20% less on something that costs less than £XXX (depending on one's income).
But even if I was to spend days or weeks reading up, I suspect that unless a product is inherently flawed or indisputably inferior in most/every specification, it is pretty hard to measure certain things like reliability. All my 2.5" external HD (probably got 7 of them by now) are Western Digital Passport. When I bought the last one, I did contemplate a Toshiba which was more than 25% cheaper for the same capacity. But I had incomplete information: I couldn't find the reviews of both drive of the same capacity compared back to back. And when it comes to reliability, I know that WD is not perfect (one of those 2.5" drive died, and I've had at least one 3.5" die on me before). Objectively I'd argue that the WD (in other capacity) seems to outperform the Toshiba, and the warranty lasts longer, but I am pretty sure that the fact that I've been using WD Passports for so long that I am used to it. And I also think that despite being the most important element, reliability is not something reviews can ascertain unless it is epidemic.