I have access to them as well. Here are my results. I've been taking ~1 per day for the past week.
Test Correct Total % Correct Mean time Percentile
m01 31 37 84% 83.4548 sec 85%
m02 33 37 89% 93.8058 sec 90%
m03 30 37 81% 111.1665 sec 80%
m04 33 37 89% 107.7445 sec 91%
m05 29 36 81% 122.0276 sec 82%
m06 24 33 73% 136.3358 sec 53%
m07 28 37 76% 121.3407 sec 66%
m08 20 34 59% 124.5703 sec 39%
I was a joint-math major (equivalent to minor) in college so I was fairly surprised by my low scores. As you can see the more I do the WORSE i get... not sure if these results are typical, but they sure as hell are frustrating. I haven't taken the official GMAT yet but am shooting for 50+.