There are numerous misconceptions in that article. Fruits aren't a very good source of fiber; roots and bran are better sources, and don't yield nearly as much sugars. The writer claims that fiber has zero nutritional value but that's only true (if at all) for insoluble fiber - soluble fiber is digested by gut fauna and produces a host of metabolically active components. The writer further claims that fiber causes various illnesses but doesn't seem to deliver any sources for that claim. On the other hand, there is plenty of medical literature linking lack of fiber with various diseases. For instance, look at: http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&sid=77ed7da9463357d9a09892213e5c74db&rgn=div8&view=text&node=21:2.0.1.1.2.5.1.12&idno=21