No luck hopping here, but my 6T rig was renting out to WestHash earlier today.  It just fully returned to this pool about an hour ago.  With my current settings WH has to exceed 25% above expected BTC for my whole rig to switch over like it did today (which is very rare).  I noticed the pool hash rate jumped up since I returned, so I wonder if others were doing the same and affecting the hash rate here.