How very high reading/listening but low speaking/writing TOEFL scores are usually judged on graduate admission?
Speaking ability is considered very important; the TOEFL is used to determine if you can speak well enough to teach as a TA at US universities.  Keep in mind teaching is also high pressure, like taking an exam.

These scores might do better with degree programs which do not require the graduate student to teach.

http://www.ets.org/toefl/ibt/scores/understand