Just from a personal perspective, I was testing consistently in the high 160's before taking my first LSAT. Then, due to a variety of factors, I had a panic attack during the first section and left about 8 answers blank! However, in my delusion I convinced myself it was the experimental section. It was not. This ended up in a 162. I took it again with no further preparation and got a 168, which felt more akin to my true abilities. It's only a six point difference, and when averaged it's only a 165, but I can tell you that the difference in response is huge. Some schools only
take the highest score, which is great. In short, a few points makes a BIG difference, especially at the higher end of the spectrum!