If it is real then congrats to you and well done! But...This happened to me - I later found out it was because my pages had 2 lots of the Analytics code on them which was mis-representing the figures.
Bounce rate refers to the percentage of visitors who view only one page of your website before leaving. I think it will help if you have more interesting and good contents so it will not only be the first page of site that they will be visiting.
My average is currently 29% and I have to say that everything below -10% is already quite impressive. Ofcourse it's also based on the traffic you get and where the traffic is coming from.