Just smoke some weed and take the test! < Just Kidding - pardon my humor! > Don’t waste time preparing!!
Frankly, there is no difference between a 760 and a 800 as far as schools are concerned, as someone else has mentioned earlier! Why do u want to waste your time trying to get a higher score. The opportunity cost will not be worth it!
<It' summer dude, I rather be climbing a mountain or enjoying myself outside than study for GMAT!> Rather you can use the time to work on other aspect of the application! Even a 800 score doesn’t guarantee you an admission!
As for the GMAT-Prep, it is quite accurate. I have taken the tests couple of time and have seen the questions repeat. So I do not think it is adaptive! However, the scores are very close to what you can expect.
Worst case I would recommend you to do both the tests in GMAT-Prep, so as to get used to the timing and familiarize yourself with the test format; and be careful, during the test, not to make any silly mistake! Then just take the REAL GMAT!
Just my $0.02! Hope this is useful!
P.S.: I concur with some of the comments above that the message was worded in a manner that sounds
more boastful than
a request for advice! Be mindful in your essay! Admissions Committee usually doesn’t like people who are arrogant! B-School applicants are supposed to be future leaders in Corporations and in Governments! Who would want to be led by an arrogant leader?