I just Beat The GMAT!

Hi-

I just took one of the CAT from the official GMAT website and received a 490.

37 Quantitative- about the same score I have been getting on all the Manhattan GMAT CATs.
21 Verbal- the lowest I have ever scored on this section.

I have taken 6 CATs from Manhattan GMAT and was always in the low 590-640 range. I have been studying for over 6 months and I only have three weeks for the real exam.

The CAT from the official GMAT website is the best indication of how I will do on the actual exam, correct?

I am going to focus more on verbal and hopefully get my score up. How realistic is it for me to actually get a 600 or above on this exam given my disappoint 490?

Any input is appreciated.

Thanks!