Thank you for the quick replies. As I was thinking about the answers in reference to the reference circuit (ha), I started wondering if it was possible that it might mean "not critical" because , if I'm not mistaken, every one of those pathways would be a low voltage, low current path and doesn't depend on a specific pulse/frequency? Even the pwm dimming input could be any frequency because the pwm that powers the led's is set on the led power side? Am I wrong in any of those assumptions?
But that still begs the question why a reference circuit would not have the value that they used. That is a circuit already put into practice, no? I could see it in the typical circuit, but they group many of those in/outs so those components are unnecessary anyhow.