Disk averaged MRI quality factors in θ and ϕ of each simulation, row-wise. Dashed lines are the median values taken over the time span shown in the graphs. Besides the median values we also give corresponding time averaged values. Due to the skewed nature of the temporal distriubtion of the disk averaged Q factors, the median is more appropriate for interpretation. It is noted that for Q^(θ) ∼ (3 − 6)% of points lie outside the graph, i.e. are above 100 in the three simulations. For Q^(ϕ) ∼ 1% are concerned.