JohnRoy - 3:06 am on Feb 4, 2009 (gmt 0)

If the site you're testing is about insurance as shown in your first example, I would take the liberty to believe that it's _not_ your changing the title which made the difference.

If it's only an example, but in reality it's a low-profile keyword, it might be that this small thing that made the big difference in such a small amount of time.