@all: how important is the effective hash rate value?
Isn't the reported by miner value the one to look at?

C0inZ: yeah, it shows only the past hour values, nanopool shows the ones of each past hour, it makes it easier to compare IMO (for example: start at 9:00 and compare the accepted shares with the number after 1 hour (between 9:00 and 10:00)
for me (while using nanopool) it was the exact number

the default worker is the one with the redirected devfee share(s) and it usually disappears if nothing was found after the next devfee round 1 hour later.