Generally speaking in hifi there are 2 main camps. Believers and sceptics. Now im not saying your either one or the other, simply that generally speaking most people gravitate towards one or the other
For example
I see genuine differences with BLU RAY playback between my oppo 95, S370 and PS3 on my not very high end Sony 46W5500
Ive seen reports like posted above where people (A group of people) couldnt tell differences on much bigger screens
Why is this? I could say everyone in the test/s have bad eyesight - but as that seems to upset many (Because we all know everyone has perfect vision
). So lets talk about believers and sceptics
A believer (like me) will have -
A mains conditioner (I actually have 2 mains conditioners and a balanced mains transformer). A decent rack (Atacama and rubber feet inbetween the rack and the equipment). A decent HDMI cable (Van Den Hul). Decent mains cables (Like Russ Andrews, mine are copies). Fully calibrated equipment (Both camps should have this regardless)
A sceptic will have -
Dirty mains. Cheapest cables you can buy (or came free with the equipment). Equipment on anything (On each other in a lot of cases).
Lets just assume for a moment that the believers are correct. That to see genuine differences and have the eyes capable of seeing genuine differences that you NEED a clean mains supply, a well made HDMI cable and something half decent to sit the equipment on.
Perhaps, just perhaps, THAT is why people cant tell a difference (Including the online tests, and especially online tests done by sceptics)
Someone also mentioned that 1080P 24Hz pics should be the same off of any bluray player. But ive read that the sony S5000 goes through picture filters regardless of settings. Im no believer in filters, the signal should be as clean as possible to my mind, as any change might make some pics look better, but it will 'always' be at detriment to some others (And not as the director intended either way).
My Oppo 95, PS3 and S370 dont use any filters that im aware of, and I can see genuine differences watching blurays. Nothing major - not that old chestnut 'night and day', but subtle differences ive noticed over time.