Well, I suppose I'm most interested in the criticisms of what he's presented. I don't see any comments on the blog itself, is there any other place where there is discussion on what he's presented?
One thing that I didn't love was his explanation about how timing the market is just a different way of diversifying your assets, that was more or less equally valid (its like the first thing he talks about in the moving average article). Perhaps if you could say something like I will randomly pick a month each year where I will hold all bonds, and the other 11 months I will hold all stocks, I could see how this is equivalent to having a 1/12 to 11/12 bond / stock allocation. To me, theres a huge difference if you're using timing, since its an active strategy that switches your position.
I guess I also thought it got a little weak when he finally presents the growth trend timing strategy. I guess I thought the reasoning behind including the extra external factors was not convincing and adds to the complexity. Yes, it clearly backtests well, but not being an economist like him, the reports he's referencing as signals mean alot less to me, so its difficult for me to imagine using something like that that I don't understand very well. The moving average strategy, although it didn't do as well in his tests, makes perfect sense to my mathematical brain.
