I was 26 and had been riding on the street for 11 years when I took my first safety course so I could ride on the base as I was getting sick of parking outside the gate and walking in. I learned a lot, don't get me wrong, however they spent an inordinate amount of time with the counter steering thing.
I had never heard the term (this was in the 80's) and it seemed strange to me. Practiced a couple times and realized I was doing it the whole time, as a bike can't be steered over maybe 5 mph any other way.
My riding did not change with all this counter steering knowledge. Too much time thinking about it will just give you a headache. Want to remember something that will actually change your riding? Remember to look through the turn/curve and not right in front of the front wheel.
In an emergency, move the bike quickly. Countersteering will happen whether you think about it or not.