I got Q 48 in actual GMAT and I finsihed 35 questions in 60 mins, I had 15 mins for last 2 questions, I guess , thats bad time management tooo..
But I think if I had scored Q50, with my V32, I wud've probably got around 670-680.. not sure though..
Try to take 1.5 min for each question after the first 10 questions, even if you finish is quickly, double triple check the answers, I may have made some simple mistakes... Nothing seemed unsolvable for me, I was in comfort zone with every question... Only thing my mind was pushing me so I wont get stuck with one single question...
All the best,.... Quant is definitely at GMATPrep and OG12 level definitely not beyond... Verbal was a different story for me...