Since Integrated Reasoning is contributing towards your final score, the average score has dropped. Students should not worry but rather prepare vigorously as there are charts dispatched by GMAC stating somebody getting a 700 score earlier will mean a 655 or 645 score on the GMAT focus edition. Score comparisons between the Old GMAT and the GMAT Focus can be viewed here. Time management and more of the analytical skills being assessed currently are the key focus areas a student should focus upon.