Agreed, interesting. In general I agree with their conclusions, though here are my experiences with my '93:
Test #1 Aggressive Driving vs. Moderate Driving
Their Result: Major savings potential
My Result: Driving like a jerk burns gas, but so does driving like a grandmother. I get better gas mileage by firmly, but not aggressively, getting into OD as quickly as possible.
Test #2 Lower Speeds Saves Gas
Their Result: Substantial savings on a long trip
My Result: Absolutely true for any driving. I actually find there's not a huge loss in mpg going from 55 to about 65 mph. But anything over 65 mph really starts burning fuel.
Test #3 Use Cruise Control
Their Result: Surprisingly effective way to save gas
My Result: Great unless you drive hills. Then it performs worse than manual control.
Test #4 A/C On, Windows Up vs. A/C Off, Windows Down
Their Result: Nice in theory; not true in practice
My Result: The same. In fact, driving with the A/C Off and Windows Up doesn't make too much difference either.
Test #5 Check Your Tire Pressure
Their Result: Check your tire pressure often but don't expect a big savings.
My Result: Very important. A loss of 4 lbs. = a loss of almost 2 mpg for me.
Test #6 Avoid Excessive Idling
Their Result: More important than we assumed
My Result: Probably true. I do shut the engine off if I'm at a long stop (like a train crossing). But I don't think the added wear and tear on the engine makes it worthwhile for short stops (like at traffic lights, etc.)