ISTR bill mentioned SSS doesn't scatter blue well ~ 1 year ago, hence SM knows about it, and it mightn't have those blue areas if somebody tried a diffuse emitter/envsphere with no blue, which would not look good.  however, if snarly's or somebody's scene is only using one bounce, that is not enough for realism.  poser can do 16 or more bounces for extra raytrace depth in a completely enclosed building scene, but I reckon 4 bounces is more than enough for renders in empty scene. 

@ mori:  the reason I mentioned IDL IC = 100 is that it skips the precalc (as you noted) and sets GIMaxError to zero (no interpolation), but apparently the blue is a scatter error (in case any of the scatter error variables have been tried), not a GI interpolation error.  AFAIK they speeded up the no-precalc method for the next release.