How Some Class Instruction is like an Infomercial

The infomercial is a 30- or 60- minute commercial that markets a product to a consumer.  The interesting thing about these types of commercial is that they spend this entire time training the consumer about the product.  Of course the commercial could have trained the consumer about the product in about 5 minutes but instead they use the entire time. 

I believe a lot of educators are like infomercials.  They take content that could be effectively taught in 5 minutes and stretch it out over an unbelievable amount of time.  The expression, "less is more" comes to mind.  Instead of overwhelming the concep being taught, the time would be better spent with classroom discussion, student interaction, student discovery, etc. after introducing the core concept.  

To me it is why some classes can be taught in a weekend as opposed to a sixteen-week stretch.