cbc radio one broadcast Dogs themselves

In December there was a three part radio broadcast on CBC radio one called "Dogs themselves" with among others Suzanne Clouthier and Gillian Ridgeway. The discussion was about do dogs have cognitive ability and if so how do dogs view the world. It was very interesting in that the general consensus was that dogs do have cognitive ability but view the world differently. It was suggested that dogs see the world more in pictures than in a verbal sense. Dr. Coren has suggested that dogs see the world and have memory much like a two year old child does.
Although I have no scientific observations to back it up am of the opinion that dogs actually understand more than they are actually given credit for.
For those reading my blog and or following it, I would be interested in comments and stories about the cognitive ability of dogs and how much others feel their dogs actually understand.