... looks like the pool speed might have dipped a bit ... luck hoppers moving on. Stay on 'dig-in' mode all things will average out.
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.
Well you can now see some historical pool performance and where the hopping happened

The Pool->Graph is the actual shift reward performance (like the worker shift graph)
What this means is that it shows the amount of shares that were accepted per shift (again like the worker shift graph)
Although we have the ckpool performance numbers that better estimate the actual miner performance, the graphs report the reward performance since that is what is used for payouts.
Edit: oh and it uses the same checkbox settings for both the worker and the pool graph.
So changing one changes it for both.