You're right. It's still a good size wingspan. However, most folks think Hys are gargantuanly humongous. And that's mainly due to those many inaccurate assertions published on the Internet that I've mentioned. I've seen quite a few Hys in person and I've reviewed plenty of real size and weight data. See for yourself... have a look at the following figures taken from real birds during veterinary examinations:
http://www.preciselyparrots.com/show...nd-Weight-Data
Note: On Scott McDonald's chart, the first figure is the 'mean' (average) weight for the species. The middle figure is a 20% range from that mean weight. And the last figure is the heaviest noted weight among the species.