ah I found it, from Dr Nuno Monteiro's website:
"Then study long and hard for the GRE. The verbal scores are important to the extent that a low score, say, below 160, will make people wonder whether you can actually understand and express yourself in english. But this usually also comes across in other parts of your application. The math score is very important, and anything below 165 is not a plus. (Anything below 160 is bad; between 160-164 it’s okay but not a plus, so if you want to compensate for a low GPA or lukewarm letters, you’ll need higher, at least 165.) Schools differ in the importance they attribute to the analytic score. Some don’t care. If they do — as many of the top schools do — anything below a 5.5 is not a plus; and anything below a 5.0 is a red flag. If you do significantly below these levels the first time, take the test again. If you do consistently below what you think your capabilities are, add a statement to your application indicating you typically don’t do well in standardized tests. It may help."
http://www.nunomonteiro.org/advice/grad-admissions