I haven't seen his games but I am skeptical of his methods. Tactics flow from positional elements and rarely in isolation. One needs a more organic grasp of the game to be truly successful.
BTW: The strongest engines are not just calculators. For example, Rybka is built by a team of IMs with feedback from GMs and many other strong players. As such, it understands numerous positional features. In fact, most programs today have a lot of positional knowledge and would be many hundreds of points weaker without it.
Chess is 99% tactics that is starting to be boring. I know that my biggest chess improvement was help of tactics, but then I had never heard about de la Maza chess improvement. I improve 600 points in my first year of tournament play, but I was 17. Do you had ever seen the game of Michael de la Maza?
I saw it was so equal, he couldn't build anything expect of looking for win of material. Open files, open centre, open everything. We our humans, we shouldn't play like computers. Chess isn't only tactics there are openings, endgames, strategy. Building combination only from nothing is sick!!