Which breeds of dogs are considered to be the MOST and LEAST intelligent?

The following is information based on S. Coren's book "The Intelligence of Dogs."

Border Collie -Brightest
Afghan Hound- Least Intelligent

Ranks 1 to 10
Brightest Dogs

Understanding of New Commands: Less than 5 repetitions.
Obey First Command: 95% of the time or better.


Rank Breed
1 Border Collie
2 Poodle
3 German Shepherd
4 Golden Retriever
5 Doberman Pinscher
6 Shetland Sheepdog
7 Labrador Retriever
8 Papillon
9 Rottweiler
10 Australian Cattle Dog

Ranks 70 to 79
Lowest Degree of Working/Obedience Intelligence

Understanding of New Commands: 80 to 100 repetitions or more.
Obey First Command: 25% of the time or worse.

Rank Breed
70 Shih Tzu
71 Basset Hound
72 Mastiff/Beagle
73 Pekingese
74 Bloodhound
75 Borzoi
76 Chow Chow
77 Bulldog
78 Basenji
79 Afghan Hound

This information is from
http://petrix.com/dogint/intelligence.html

Just exactly what I wanted to know. Thanks for the answer, and the very prompt service.