Hi
zxfjac,
Examining ESRs for GMATs taken on and after April 16th is still a good idea, but don't expect the newly formatted ESRs to tell you much in terms of the precise distributions of question types. GMAT ESRs have traditionally not indicated the number of questions of each type, only your 0-51 subscore on each individual section, the total number of questions, and your percentile ranking on each type of questions (though not your percent correct on each question type). In fact, GMAC seems to be suggesting that more information is being removed than added:
source: GMAC websiteIn the past you have also been provided with your percent correct on each quarter of the test, from which we have been able to use the "denominator method" to determine the precise number of scored questions in each quarter (and thus infer the total number of experimentals, even though GMAC never told us directly):
How Many Experimental/Pretest/Unscored Questions are on the GMAT?In other words, unless the GMAC chooses to start providing the exact number of question types for the first time, the ESRs won't tell us more than what we already know (that the total number of experimental questions has been reduced by 11, and the total number of counted questions has stayed the same).
Keep in mind that there will still be 12 experimental questions (9 total on Quant and Verbal), and we have no idea what types of questions those will be on the real GMAT--think of it as "dealer's choice." In other words, GMAC is not promising that the precise distribution of questions on every GMAT is the same, and is reserving the right to administer whatever mix of questions it desires through these experimentals, which are presumably distributed evenly throughout the test. Or as the GMAC puts it, "item development needs change over time." Translation: new questions are constantly being written and they need to be administered as "pretest" questions, which I always thought was a misnomer because it's not a PRETEST question if it shows up on YOUR TEST and wastes valuable time.
If the GMAC needs to "test the effectiveness" of more CR questions, for example, then it reserves the right to serve you a bunch of CR experimentals on your exam--maybe even all 6 experimental questions on Verbal. In reality, however, I would expect the proportion of question types on the real GMAT to be roughly even, with a slight emphasis toward PS over DS on Quant, and a slight emphasis toward RC and SC over CR on Verbal--the same as on the updated, upcoming GMATPrep software (at the risk of being redundant, see below graphic).
source: AjiteshArun-Brian
p.s. for more detailed ESR information, check out this thread:
https://gmatclub.com/forum/information-on-new-gmat-esr-report-beta-221111.html