I've learned one thing very early in my GMAT studies. Improved scores over time are not necessarily guaranteed. I got a 610 on the GMATPrep (the first test I ever took and with no studying). My next text was paper and pencil, not a CAT at
Kaplan. Still, I got a 660. I figured that this being my only test I'll get a 710 in my sleep at the real GMAT. Next test was the second GMATPrep and I got a 590. Then after that I got a 510. My next test? A 710. I figured, again that I got on the right track and it was a turning point. How wrong I was. The next 3 tests? 610, 600, and 600. Finally I got some improvement today. I got a 660. BUT, my verbal has severely regressed. I kicked butt in Math. The highest percentile I ever got. I got 88th percentile or a 49. My verbal was 48th percentile or a 28. I have neglected studying for Verbal lately (though I do study it in
Kaplan and for homework). Also for some reason my concentration has dropped the last two tests. That test I had I got a 29 in verbal. This makes it sound like I've always stunk at Verbal. But remember that 710 I got? I got 98th percentile or 45. So yep, I fell 50 percentile points since then. So moral of the story is that you shouldn't necessarily expect improvement.