How much would your productivity increase if it were not possible to view RZ at work?
I'm pretty good at staying off during the mornings (today excepted) but mid to late afternoon is when I find myself more interested in RZ than work. Even without RZ I drift off in the late afternoon. Of course, I do my best work in the mornings till about 2-3pm. Then I fade with another burst of energy from 6ish till 8ish.
It also depends if there is a day game or big breaking news. Then forget it.
So I'd say on average, 5 to 10% increase.