tedster - 11:07 pm on Oct 23, 2011 (gmt 0)
EWOQ is Google's acronym for their human editorial evaluation system.
Here is some of the exact wording from Google's 2005 Historical Data patent:
... Valuable (legitimate) domains are often paid for several years in advance, while doorway (illegitimate) domains rarely are used for more than a year. Therefore, the date when a domain expires in the future can be used as a factor in predicting the legitimacy of a domain.