Is Campagnolo's stuff actually better than Shimano and SRAM's stuff?

From everything I've read Shimano's shifting is the best of the three. So what's justifying Campagnolo charging significantly more than Shimano? "Mystique"?

No wonder they are going under. Mystique is only if your stuff is better. If your stuff is worse, then you're just worse, the end.

Now let's say at the high end all the groups are so close that any "better" or "worse" is just picking at nothing. Ok, great. So if it's all the same, then why would anyone pay more? "Mystique" again?

It turns out that customers are actually rational. Who would have thought.