Alright, here is my preliminary report...I may post more once I regain some mental stamina.
As mentioned above, I was looking for around a 640-650.
I scored a 660

Q42, 61th percentile, V39 87th percentile, total 660, 82nd percentile.
All in all I'm quite pleased.
I actually found that the math on the actual gmat, other than 2 questions, was actually easier than on the gmat prep software. In contrast to that, I found the verbal actually much harder than on the gmat prep, although I suppose that could have been because I was doing better at it, so started to see the harder questions.
I actually had 2 quant questions that I literally didn't even understand what the question was asking, so I just guessed and moved on without wasting time.
Time seemed to standstill or my brain was working faster than in prep also. In prep, I typically would get to the end of the quant section, with 3 questions left, but no time remaining, whereas in the real test I got to the end of quant with 4 minutes left.
Anyway, good luck to everyone else taking this. I'm happy with my first attempt of 660, and will not be re-taking the exam.