netmeg - 1:38 am on Jul 9, 2011 (gmt 0)

I wouldn't worry about that; the bounce rate by itself probably isn't that big a deal - it's probably more a problem if you think the users aren't likely finding what they want and clicking back to keep searching in Google. From the time-on-page it sounds like they aren't, but looking at the keywords that are bringing traffic might give you some insight on that as well.