Personally.... I don't believe I would trust the advice of Any Driving Instructor on the subject of closing speeds if:
It took the guy 2 years to make his presence known on the road - what sort of driving speed is that anyway!!
And if so, did so, in a manner that could basically be construed by other drivers as being a Spam Approach! - which of course in All Honesty and 1st Post Reality.. it is!
Within the spam drive, the guy promoted perfect driving lesson conditions in an Aussie suburb, but neglected to mention the high probability that Kangaroos could also be reasonably expected to be found on the very roads used by the school - It doesn't take much to consider the level of damage that can be caused by a high speed kangaroo slamming into a Very Slow Driver like this Driver! - What is the average Kangaroo Approach Speed anyway?