I have heard that about them if you get them as babies but I was uneasy about buying from a flipper or just anyone so I got mine from one of the original importers of the true SD's. My male was one of the last adults to enter the country before the ban on exporting them from the islands went into effect. He was only used as a breeder for 4 years and never handled so he's a nut-job to say the least lol!
My girl is a Honey Island but very few of them entered the country before the exporting was stopped so they are hard to find. I have seen one or 2 for sale this year but I do not know if they were pure honey islands. They do only get up to 7-8 ft and are much more colorful than the true SDs. High yellow. My girl has a great temperament and is a pleasure to handle. This will be her 5th winter and she is still under 7ft.
The scale pattern on the head is very different between the 2 so aside from obvious color differences, that is a good way to distinguish them.