Or, how long after an application is published by the USPTO is it included in the Google Patent database?
For example, as of today, 2014-11-12, the most recent utility application was published 2014-11-06 (US20140331368). It looks like the most recent application available on Google was published 2014-10-09 (US20140304863), which would make it at least 4 weeks.
The Google Patents help page just says that it covers the "entire collection". No clarification on the Wikipedia article either.