The comment you cite has enough made up data and weak reasoning to make the daily mail look respectable. For actual data, let us turn to the internet. The February 2007 report involving chimpanzees does lend credibility to this orangutan picture:

http://www.washingtonpost.com/wp-dyn/content/article/2007/02...

http://www.newscientist.com/article.ns?id=dn11234