Quote: "The SAT is mostly a test of mental quickness."
Fortunately for some kids, they can also do well without a lot of formal SAT prep. Some kids are just better standardized test takers than others. My S is one of those good test takers. He took the PSAT (only once) and the SAT only once. He spent about two hours the night before the SAT test doing some practice examples. He scored very well and never looked back.
He used the same strategy for the SAT II's.
I think that if he read the "xiggi method" it would have scared the heck out of him. He was probably much more efficient using his own method.
Now, my D (13 year old) is a totally different story. She is the type that will probably be more confident after more extensive practice.