Design knowledge as fast food?

There are may methods to inspire design and to critique design or any kind of project. A deck of card is one such materialization of knowledge.

Methodkit
http://www.methodkit.com/shop/methodkit-for-web-development/

Method cards for Ideo
http://www.ideo.com/work/method-cards/

Yep, a deck of card can be food for thought. But which kind of food for thought is it - slow or fast? Who is consuming it? And why?