Interesting... I don't remember if I ever asked Bex or not when I was at NERC or another mate at TC... But here we operate (are validated) in between 5 and 7 sectors normally in the enroute environment. In Approach (TC) at the very slow places there will be two maybe three sectors and at the busy places they will be split up and a controller will normally be certified on between five and eight sectors.... Intersting difference...
regards
Scott