Blind? No. There has always been some degree of expectation bias. I've been using computer audio for many years and I have personal experience with a bevy of products but i've never sat down and A/B'd them. I don't have the luxury of keeping a bunch of expensive ADC's sitting on a shelf, buying a new one means selling the old one for part of the cost. I try to do my research, demo the product if I can, and make an informed decision.
I can't speak for other people in this thread, however, I don't think I have a double standard. I have always argued that personal experience and perceptions outweigh mere scientific data and someone listening to a few turntables and saying which one is better is enough for me. However, I draw a line between saying "this is my opinion" and saying "this is my opinion and I think that's enough for me to outright say on turntable is better than another". People come to this forum for knowledge with no indication of the experience of the user behind the keyboard, so one persons opinion is anothers objective fact. There's a big difference and people are typically all too vague about making that distinction.
I also don't post in threads that I can't offer a personal opinion from experience on. I can still be completely wrong however I think that's worth something, I don't come here just to be negative about equipment I don't own.