> nobody should be claiming anything until they do something at least semi-rigorous (n>10, control group, actual sampling of Uber prices and then statistical analysis)

Couldn't agree more - right now all we have is very weak and inconclusive evidence. If someone is able to confirm this allegation, it would make for a big story and potential lawsuit, especially since Uber has been publicly and categorically denying the claim for at least 5 years.