For the record, I've taken far more than my fair share of lessons from various PSIA-affiliated instructors. I've never been formally involved in a race program. I am not a currently practicing instructor.
I have, at various times, been introduced to all of the drills shown in Rick's video. My skill level at doing the various highlighted drills varies from "pretty good" to "not so good". I've never been much of a "doing drills" type of guy, although I do start practicing when my stubborn ass finally "sees the point". I was first introduced to pivot slips seven or eight years ago; it wasn't until the past year or two that I bothered practicing them with any regularity though.
So while the students in the video demonstrated a variety of competences at the drills, I don't see that as meaning that this is the first time they've been introduced to the drill.
Depending on the full/part-time status of the students in the video, their number of years spent instructing, etc... Not everybody has endless time or motivation to practice various drills. Give these guys a break.