If you look at the raw NS score, I think it might be even a tad generous. A 127 will get you an 80%tile(508), and my raw NS scores are roughly 70% for any 127s I get. I know raw and percentile aren't the same, but I think it's fair that you get a 10% bump after converting. Each test is a bit different in scale though, and I think NS psych is way too generous compared to the scored aamc mcat.