I am sorry maybe you missunderstood. In her post she said that when she took them for a walk she was discouraged with the results. What I am saying is that no, they are not going to learn in just a few walks.. It will take time, as with potty training. I disagree with you, because what I said is correct. potty training, and leash training will take more than a day.
And I do not agree with you that a 7 week old puppy should have a collar right away. No a harness does not encourage pulling. There are many breeds that should not wear collars and that does not mean you have to live with pulling. At 7 weeks, they will be pulling, and being pulled, and I don't think a collar is the best choice. That is my opinion, you have yours. Does not make mine wrong, but thanks.