september 21, 2012 was the date the site-design was replaced with a new one... bouncerate dropped overnight from around 30% to under 10%... Later on in the graphic you see some peaks;tweaking and testing and then it dropped under 1% for a while... it's now still under 10%. (StrugglingBabes.com)
Design; look; feel and i think simplicity of site-structure, etc matters a lot...
One thing i learned is that you have influence on your bounce-rate...