I think their point is that anecdotes are not very valuable and then gave examples of anecdotes that differ as a way to show that individual experiences / perceptions can be vastly different, which isn't at odds with their original point.

The point being that you can easily summon anecdotes for or against virtually any proposition, so they tell you very little about the incidence of a phenomenon. Emptyfile also pointed out a venue where it would be easy to find counterexamples to Synaesthesia's claim.