Hey, Dennis has rewritten his stuff and called it a "book" since the last time I saw it!
Dennis Grant is a good guy. I don't remember if I've actually met him (might have at the Solo Nats in '99), but we had a lot of discourse on the old Team.Net autocross mail list back in the day. He's obviously VERY opinionated, however.
Bear in mind that the level of tuning he's talking about is what a "national level autocross champion" needs. If you're nowhere near that level as a driver, having shocks that are dialed in to that degree is not something that you're really going to notice.
Yes, there's good, better and best... and there's decent, mediocre, bad and really bad. I'm really not sure where the K-Sports fit on that scale... but I've had Koni Sports, both standard and revalved/degassed, I've had adjustable Teins, and I've had K-Sports on two different cars, all with a variety of different spring rates. I found them all to work quite well when adjusted properly.
Of course, if you ask Jeff, that probably doesn't mean much. I'm a very "adaptable" driver. But, still... none of the roads or autocross surfaces that we drive on are "perfect" or even remotely "consistent". And most of our skillsets (mine included) are also lacking in many ways. With all of this imperfection... is it really worth it to pay 2-3 times as much money for "perfect" shocks?