A Tight slap on face :)

Hi Abhinav, it actually looks like your prep scores were pretty accurate on their own. You got a quant score that was only slightly above your test scores and a quant score that unfortunately was below your test scores. The good news is, you already have an idea what you need to work on: the verbal part. If you can boost your quant score from 48 to 49 or 50, great, but it's the verbal score that's going to show you big increases in your score.

When people perform more poorly on the verbal section on the real GMAT than in the practice tests, it's often because they were tired or stressed. Given that the verbal section is the last part of a four hour exam, the mental fatigue can start to weigh on you. When you practice, are you putting in full GMATs with the AWA and IR? That can make a difference as to your body's preparedness to excel at the exam. Much like a runner who always runs 5 kms in practice and then tries to do a 10 km race, you might start feeling tired towards the end. If you think this may have happened, try the next couple of practice tests full length with the AWA and IR and see how you feel in the verbal section.

Some people also get nervous on tests, or sleep poorly the night before. This has caused more than a few students to underperform on the exam. Test day pressure can be unnerving. At least you've taken the exam once now, so the butterflies may be a little less present the next time you take the exam.

If neither of these issues seem correct, then maybe just review the verbal section theory and questions. You underperformed on one test vs your practice scores, but I don't think it requires a major overhaul of your strategy. You're already doing really well in quant, now you just need to get the verbal section up a bit and you'll hit that 650 you want.

Hope this helps!
-Ron