Exactly that.  I was looking at the images and I realized that this one was super noisy.  I suspect it may have been this way for a long time.  Maybe since the last time I mucked around with the default draw options.  I don't think it was that noisy when we first made this script, but I could be wrong.

Also, the HSM measurement (run at the end of the script) differed from the truth rather badly, which seemed like it wasn't a great advertisement of the method.  Increasing the S/N helps it a lot.