The general remarks are pretty accurate, but then we sort of knew "water is wet".
To actually understand what's going on, you need another thousand pages.
The exact closing point vs. RPM data is way too specific; it's greatly affected by displacement and port size, somewhat by LSA, much less by rod angle. IMHO they're a bit too optimistic if applied to older engines - they show (example) that a 250° @ .053" cam (timed 30-40) has power at 3,600. This may be true, but it falls off the planet at 3,000 in a small engine.
Choose more conservative figures to be safe.
