http://thehydrantblog.com/2011/05/03/the-intelligence-of-dogs-the-list/ 

Ranking of dogs by breed

Brightest Dogs

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

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

Excellent Working Dogs

• Understanding of New Commands: 5 to 15 repetitions.
• Obey First Command: 85% of the time or better.

11. Pembroke Welsh Corgi
12. Miniature Schnauzer
13. English Springer Spaniel
14. Belgian Shepherd Tervuren
15. Schipperke
    Belgian Sheepdog
16. Collie
    Keeshond
17. German Shorthaired Pointer
18. Flat-Coated Retriever
    English Cocker Spaniel
    Standard Schnauzer
19. Brittany
20. Cocker Spaniel
21. Weimaraner
22. Belgian Malinois
    Bernese Mountain Dog
23. Pomeranian
24. Irish Water Spaniel
25. Vizsla
26. Cardigan Welsh Corgi

Above Average Working Dogs

• Understanding of New Commands: 15 to 25 repetitions.
• Obey First Command: 70% of the time or better

27. Chesapeake Bay Retriever
    Puli
    Yorkshire Terrier
28. Giant Schnauzer
29. Airedale Terrier
    Bouvier des Flandres
30. Border Terrier
    Briard
31. Welsh Springer Spaniel
32. Manchester Terrier
33. Samoyed
34. Field Spaniel
    Newfoundland
    Australian Terrier
    American Staffordshire Terrier
    Gordon Setter
    Bearded Collie
35. Cairn Terrier
    Kerry Blue Terrier
    Irish Setter
36. Norwegian Elkhound
37. Affenpinscher
    Silky Terrier
    Miniature Pinscher
    English Setter
    Pharaoh Hound
    Clumber Spaniel
38. Norwich Terrier
39. Dalmatian

Average Working/Obedience Intelligence

• Understanding of New Commands: 25 to 40 repetitions.
• Obey First Command: 50% of the time or better.

40. Soft-Coated Wheaten Terrier
    Bedlington Terrier
    Fox Terrier (Smooth)
41. Curly Coated Retriever
    Irish Wolfhound
42. Kuvasz
    Australian Shepherd
43. Saluki
    Finnish Spitz
    Pointer
44. Cavalier King Charles Spaniel
    German Wirehaired Pointer
    Black and Tan Coonhound
    American Water Spaniel
45. Siberian Husky
    Bichon Frise
    English Toy Spaniel
46. Tibetan Spaniel
    English Foxhound
    Otterhound
    American Foxhound
    Greyhound
    Wirehaired Pointing Griffon
47. West Highland White Terrier
    Scottish Deerhound
48. Boxer
    Great Dane
49. Dachshund
    Staffordshire Bull Terrier
50. Alaskan Malamute
51. Whippet
    Chinese Shar Pei
    Wire Fox Terrier
52. Rhodesian Ridgeback
53. Ibizan Hound
    Welsh Terrier
    Irish Terrier
54. Boston Terrier
    Akita

Fair Working/Obedience Intelligence

• Understanding of New Commands: 40 to 80 repetitions.
• Obey First Command: 30% of the time or better.

55. Skye Terrier
56. Norfolk Terrier
    Sealyham Terrier
57. Pug
58. French Bulldog
59. Brussels Griffon
    Maltese
60. Italian Greyhound
61. Chinese Crested
62. Dandie Dinmont Terrier
    Petit Basset Griffon Vendeen
    Tibetan Terrier
    Japanese Chin
    Lakeland Terrier
63. Old English Sheepdog
64. Great Pyrenees
65. Scottish Terrier
    Saint Bernard
66. Bull Terrier
67. Chihuahua
68. Lhasa Apso
69. Bullmastiff

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.

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