I have studied for more 1 year and my new official test today at pearson is 540 (Q44 V22)
I studied from september 2012 to march 2013 intensively (400 hours) and my first result was 530.
So, I continu my training from june to september (10 hours per week) and the last 7 weeks for 50h/week!! with new support to improve my verbal. I used e-gmat
and some other support..... but lots of hours of training for nothing
Conclusion Gmat is too hard for nonnative not perfectly fluent..
GMAT winner, tester looser