That wouldn't be him because his advice is BS. There is one thing which I pride myself on and that is following really good Deadlifters. And not just guys who have high numbers like KK but old time pullers like Bob Gaynor who DL'ed 672 lbs at 67 years old just a few weeks ago.
And the one thing all these good pullers have in common is that they pull often, the pull heavy and they use the deadlift as their main lift to improve the deadlift. They don't just rely on its variants.
Given that the guy above mentioned doing only rack pulls to improve his deadlift, I highly doubt it is KK.