I realy appreciate the interest and responses especially Nikonian 72 for his explaination of film and Snow bear for his experiment. I know that we can't trust Internet information but because this came from Canno I gave it more consideration. In respect to the experiment it seems to me that all of the shutter speeds used would fall into what I would consider "slower shutter speeds". I rarely use a shutter speed as long as .3 sec. What about 1/500 or 1/1000, does that saturate as well as .3 sec.? Because the statement made in the Cannon tutorial does not seem to be accepted information I will conduct an experiment with theese faster shutter speeds. Thanks guys and Merry Christmas.

The tutorial is Chris Bray speaking for CannonAustralia the link is http://www.youtube.com/watch?NR=1&v=DBshTYrFbKI

In film days the belief was that slower shutter speeds gave the film MORE time to become saturated. does a sensor have a Goldilocks exposure time? Not too little, not too much?

In a youtube eos tutorial that was recomended here the tutor states that slower shutter speeds produce richer colors and more detail. With out regard to depth of field and freezing the action does this benifit come from a slower shutter and why?