I've seen this White Paper a few times, and you're right about the color assignments: the gradation seems to stop at a certain point in cyan and then jump to a steady blue which does not change through the remainder of the range. This color scheme acts as a visual noise gate to hide the flaws in the BIAS product. However, if the same color assignment is used for all products, then it is at least a fair indication that the others they tested all have higher noise.
The link that Bias cites as "matching our results" is much more accurate in showing the flaws of the Bias SRC. <http://src.infinitewave.ca/> This shows clear aliasing in Bias Peak Pro 5.2, and I'm not sure how the White Paper was able to hide this aliasing, even with their color assignments. I like the way the Infinite Wave graphs look, better than the prior Matlab ones.