I have a bounce rate of over 30% on my website but I don't think that high bounce rate justifies anyone's website. Why?
If a person is looking for some information, came to your website throug some Search Engine, got the info, and left - That doesn't mean he/she didn't like your website. Wikipedia or other information related sites will have higher bounce rate but that doesn't mean that these sites are not good. So, I disagree with this point.