If we take your very narrow definition, the chances of any programmer to be (exactly) average are zero, if we relax a little bit we're back at tautology.
Than take {1,1,2,3,3}. By any reasonable definition the average is 2, and the most frequent values are 1 and 3.
No, it's not a tautology at all. For instance, one sensible interpretation of the prediction would be that > 50% of all developers are within a range of += 10% of the average performance score. This may or may not be true.
It's not my fault the definition of average is very narrow.
The definition of average[1] is not narrow. It could be mean, median, or mode or something else.