I've got the GMAT in about a month and I've taken three practice tests so far. My performance has been about where the forums would predict, buy my timing is all over the map. Here's what I got:
Test 1: Kaplan CAT
Overall: 670 (Q44, V42)
I finished the math with about 15 minutes to spare and the verbal with about 20 minutes to go. I decided to focus on slowing down.
Test 2:
MGMAT CAT
Overall: 680 (Q46 V37)
I finished the math with about 30s to spare and actually had to guess randomly on the last verbal question to finish the test.
Test 3: OG CAT
Overall: 740 (Q49 V42)
I finished the math with about 4 minutes to spare, but I had 15 minutes left on the verbal when I finished.
I seem to be getting a feel for the natural timing in the math section (though from the looks of it, I can slow down just a bit and spend a few more minutes tackling the really tough problems), but I'm all over the map on the verbal. I think that part of the variation is due to the length of the RC passages, but I won't know beforehand how long the passages are and I don't want to be rushed on the last few problems.
I've got about a month to fix this. Has anyone else had similar problems? Advice on how to be more consistent in timing?