A single-level count is not optimal for Spanish 21, just as it is not optimal for BJ. Bear in mind that the EOR for a 5 in BJ is 0.84 (H17, DAS, LS) but the EOR for a 2 is only 0.42 in BJ. Half as much! Yet they both use the same tag in Hi-Lo. Out there, it is Hi-Lo players that are bringing in most of the profits.
But that's the price we pay if we want a counting system we can play for hours, with few errors. My objective was to present a way of beating SP21 by using the same popular system used by BJ counters. A 2-level count would be far superior, but beyond the reach of >95% of players.
The reality is that all those tricky BS plays in SP21 are completely unnecessary for the counter. Once you eliminate them, the game is no harder than BJ.
On rge21.com, a few typos have been pointed out (like "to" instead of "too"), and my BS play for 9 versus 7 for the redoubling game was corrected. Nothing of any significance (the 9 versus 7 plays are so close in EV that todouble instead of hit would cost nothing in real terms). So to say that people are rewriting my book is an exaggeration of a pretty tall order, and not very fair, considering it took me 3 years to write, including 6 months fulltime just to get my self-written simulator working. I don't mind valid, accurate or constructive criticism. I just don't see the point of negative hyperbole or people who don't have the playing knowledge, experience, or intelligence to understand what I'm trying to communicate. (The latter does not refer to you, as you are obviously an elite player.)
I think the fact that so many people are talking about my book says a lot. If it was crap, nobody would buy it, or bother discussing it on forums, like most gaming books.