I think it's well-established that the actual terms of the Randi challenge were rigged to ensure no differences would ensue. Something about 'electrically identical' or somesuch. CBA to read all the guff again to find the relevant catch.
The one thing that gets my goat in these discussions is the passive-aggressive approach of some of those of the sceptical persuasion. The OP makes it fairly clear that we have little to no conscious control over our response to the placebo effect (assuming, for the moment, that this is the key mechanism in play). Yet the sceptics' approach is often 'you heard this, but I didn't'. The subtext is always, 'I have more control over my irrational impulses than you'. (The crafty ones depersonalise it so: 'some people say they heard a difference, so I tried it for myself and heard none'. It's the same, just nicely dressed up).
Firstly, if the paper referred to by the OP is correct, they simply don't have 'more control', so they are, in claiming this, indicating their propensity for self-delusion just as much as the rest of us.
Secondly, if they hear nothing, perhaps that is because their subconscious biases suppress any perception changes. Again, a failure to acknowledge this possibility betrays a lack of self-awareness similar to that which they, indirectly, accuse the 'hearers' of.
A little more humility on the part of the sceptics, and a little more mutual respect, would take a lot of the heat out of these arguments. It'll never happen though.
As you were, chaps.