>If you look at your graphs, you can see that both of them have >a "Quality of focus" divided by two on the side. The >visual difference on those graphs is due to the fact that the >vertcial axis in the first graph starts as 0. Therefore, your >graph does not prove anything.
I think you are correct. One was recent, one was an older version. It appears they have changed the axis scale to no longer start at zero, which definitely did exaggerate the shape of the curve. I need to go back and look at some of the decisions I made; I had been depending a lot on the shape of that curve and had not realized it was being compressed/expanded.