As @getienne has pointed out, a very high score in quants may offset a score in verbal, but will raise question marks.
Also, your total score matters more than you might think, because that plays a big part in the rankings. Given a choice of two similar candidates, the school might select the candidate with the higher total score even if the other has a higher quants score.
I guess what I'm trying to say is don't discount the impact of under performing on the verbal portion. Take several practice CATs so that you are able to concentrate right through the test (4 hours).