Relationship between OG percent correct and GMAT score?

Hello everyone,

Can anyone offer an estimate of predicted GMAT scores (Quant, Verbal, and Combined Score) based upon results from the Official Guide 12th Edition and Quant/Verbal 2nd Editions?

I'm currently getting 97% of the Quantitative problems and 91% of the Verbal problems correct (OG 12 and Quant+Verbal 2nd Editions). Is 9 out of 10 good enough to score in the 40-44 range in the Verbal section? Can one assume that a 90% percent correct on the OG guides roughly implies a 90th percentile result on the GMAT? (PS and DS results are 98% and 96%, with CR, RC, and SC results at 94%, 91%, and 90%, respectively). There is not a significant reduction (< 2-3%) in the percentage of problems correct as the problems become more difficult, i.e. later problems in the OG guides.

I have already taken the GMAT (Q:50 (93%), V:33(66%), C:690(88%)), but I am hoping to improve my Verbal score to raise my combined score into the 740-760 range. My Verbal results during this round of study are much improved from my last round of study (from about 65% to 91% correct). I'm hoping a percent correct increase (25% or so) on the Official Guides is indicative of a corresponding percentile result increase (from 66% to around 90%+) on the GMAT exam.

Thank you in advance for any comments,
SJD