Whoever published that is seriously misrepresenting facts.
First, nobody keeps statistics on how often cases involving Cook Islands Trusts are challenged or settled before they go to a reported opinion. So, claims like "creditors hear about offshore trusts and then decide not to bring their cases 99% of the time" are not based on any hard information. I was able to get a good settlement against a beneficiary of a Cook Islands Trust in early 2010 and nobody asked me about it.
Second, the Cook Islands are probably the WORST place to form an offshore trust because that jurisdiction has such a sordid reputation as a debtor haven, with the best example being in infamous Anderson case: http://www.assetprotectionbook.com/foru ... f=8&t=1080