I disagree...if you toss out the "elite" schools, then a person in the top 10% of their T3 class will probably have better opportunities than someone in the bottom half of their T1 class, especially if the T3 person participated and did well in moot court and law review.
If you are an average law student, the rank of your school has a direct impact on the quality and amount of potential employers. If you are an outstanding law student you will have lots of opportunities no matter where your degree is from. Maybe not more, but about the same in many cases.
You are right to a point. The lower ranked your school, the more 'outstanding' you have to be. And transferring might be the best choice for some people. I didn't say that school 'reputation' was not important. I just think that your performance is generally more important than the name on the diploma. People should consult other sources than US News and World Reports--especially when they are thinking about giving up scholarships, law review positions, and high class ranks.