Everyone can be influenced, already with words. If someone tells you that this is going to be the best experience of your life, it is breathtaking and beautifull, then pulls out something that looks big and beautifull and shiny you are already being pre-programmed and are not able to do an objective experiment.
This was tested over and over. Even with highly regarded audio experts, they were fooled by vision. So the only true way to test something is a double blind AB test without seeing the equipment and switching instantaneously between the two setups.
This is never done in audio shows and fails the criteria every time, even worse, since you do not know the acoustic rooms, amplifiers and speakers you have 0 to compare it to.
Oh well, the same goes for so many other things in this world, winetasting the same problems and discovered when they mixed a red colour in the white wines of the expert test panel. They all failed.
Same in our branch probably, if the equipment has a HP logo on it everyone is starting to drool, if it has a Chingdong logo the mouth stays dry.