I'm curious what size area, or how many people, each one handles and I have tried every possible wording combination in Google, Bing, Yahoo etc but been unable to find the answer.
If memory serves, there are 6 RDs, each assigned to an area of the country. It's broken up by states. The "size" depends on the size of the states -- you can imagine that the NE is geographically a small area but covers as many students as someone covering a huge swath of the midwest/far west.