I think probably it is - pretty close to a normal distribution here. I would think that the beginner devs wouldn’t stay that way for long (always learning and seeking to improve their skills will soon move them into the intermediate category) or they would stop being part of the “php community”. At the other end, from what others are saying, it seems to be next to impossible to move from intermediate to being in the expert, guru and god-like categories. So the bulk of php devs will always be in the intermediate level.