For his 10th prediction: Using the Chebyshev inequality (https://en.wikipedia.org/wiki/Chebyshev%27s_inequality https://en.wikipedia.org/wiki/Chebyshev%27s_ineq

For his 10th prediction: Using the Chebyshev inequality (https://en.wikipedia.org/wiki/Chebyshev%27s_inequality https://en.wikipedia.org/wiki/Chebyshev%27s_inequality) and assuming Yegge means being two sigmas away from mean programming talent to be "average" (k=2) we see that the probability for this to happen in 0.75 for any distribution. So most of us are average.