I did 3 points better than my best overall score, and part of that was the highest PS score I ever got (I'm good with chemistry, not so great at physics). And I equalled the highest scores I got in the other two sections, so it really all came together on the right day.
I attribute it to a combination of adrenaline, determination and dumb luck. 😉
I did think the test was comparable to the online resources; I found them very helpful in my preparation (they were the only full-length practice tests I took).