Per CalPERS, here are the numbers (http://www.calpers.ca.gov/eip-docs/about/facts/facts-at-a-glance.pdf) for FY 2013-2014 retirees:
I suspect that the school member number is skewed down both due to the lower years of service and the number of part-time pension-eligible workers (e.g., substitute teachers).
The fact that many public sector employees can (and do) retire early is at least partially indicative of the value of those plans.