"Power lectures."

The Daily Cardinal -- a student newspaper here -- has a poll today:

Poll Results
What's the earliest class you would take?

8:50, I'm a trooper 48%
11 is doable 45%
Night classes only 3%
Whenever, just no power lectures 3%

"Power lectures"? I've never seen that term. Does it refer to the use of PowerPoint or to some intense, oppressive style of lecturing? Well, the option is only getting 3% so why is there even a special term for this sort of thing, whatever it is?

IN THE COMMENTS: I'm told a "power lecture" is just an extra long class. Not a very descriptive term then. "Endurance lecture" or something would be better. As a lawprof, I don't even like the use of the word "lecture," unless the teacher actually opts to lecture.