I did a 24 hour mite count today and got the following:
Regular cell/medium strength hive: 40
Regular cell/medium strength hive: 50
small cell/weak hive: 2
small cell/strong hive: 9
All 4 hives were packages/splits/swarms from this April, mostly begun on foundation only.
My experiment is over; I'm convinced enough to want to switch completely to small cell. Till then, I'll break out the powdered sugar to help get those two hives through till the eucalyptus starts blooming in late December.