This article explains why the Every visit to the page and Automatically don’t have dramatic differences.
http://msdn2.microsoft.com/en-us/library/Bb250442.aspx#ie_introfiddler2_topic4
Essentially, if the cache copy is fresh (based on the “Expires” set in the header) no request is issued by the browser. Only when the cache is stale or no cache-directives are present do you [...]


