Accelerate Quickly in Hybrid for Best MPG?

Hmm. This recent article in Mother Earth News passes on information that contradicts what I’ve heard from several sources. What do those of you “in the know” think about it?

“Contrary to what we were taught in driver’s education, when you’re accelerating up to cruising speed in a hybrid, do so briskly,” says [Amory Lovins, senior author of Winning the Oil Endgame and chief executive officer of Rocky Mountain Institute, an independent, nonprofit think tank devoted to energy and resource efficiency] who owns a Honda Insight that gets 63 mpg. ‘The engine is most efficient at high speed and torque, so you’ll use less fuel accelerating aggressively for a short time than accelerating slowly for a long time.”