讲的是 manhattan的人参加GMAC Test Prep Summit后和GMAC的人（Dr. Lawrence M. Rudner, Chief Psychometrician of GMAC）交流后的的心得体会。 觉得和我们平时了解的不一样。
1. GMAC强调了前十题没有传说中重要，正确率不比timing重要，做不完可能有15%的惩罚。
For those who may not have seen the data before, Larry again showed us real data showing how a 70th percentile test taker would drop if she left the last five questions blank. Assuming that she was at the 70th percentile when she ran out of time, that student would end up with a 55th percentile score – a 15-percentile-point drop!
2.SC有变化，强调meaning rather than grammar。
例子说明 Official Guide Verbal Supplement 2nd Edition and take a look at question 37.
GMAC has asked ACT (the people who write the actual test questions for GMAC) to emphasize meaning more on SC questions.
If you’re concentrating solely on the grammar and haven’t learned how to incorporate meaning into your assessment, you’re going to find the real GMAT harder.
3. GMAC 目标， 没有Idioms题。
They’ve asked ACT to phase idioms out completely and, ideally, there already aren’t any more questions that hinge on knowledge of idioms.
