Very Interesting Article By Dr. Klotzbach of Colorado State University:

The web address to this article is:

http://wattsupwiththat.com/2010/08/10/klotzbach-on-atlantic-hurricane-season-analysis/ .

Here is an excerpt from the article:
The average date of 2nd hurricane formation for all years that are La Nina years is August 21, and you will note that five years with very high ACE values of 170 or greater did not have their 2nd hurricane formation until August 20th or later. The 2nd storm in 1961 did not form until September, and that September went on to have four major hurricanes, a record for the month. So, from a climatological perspective, it is not time to write off the TC season yet.