TFA lists C at number 3 per the Tiobe ranking and the linked Tiobe report has Ruby at #24. I tried to find a different list for comparison as I dont think that is true for projects at large. This project [1] for instance tracks github repositories with Ruby at #8 and C at #9 which is closer to what I expected (both in the top-fifteen, neither in the top-three). At least it confirms my bias, and maybe we learn more about who is being surveyed.