The author is correct. Redick takes the cake in that regard. Maybe after a bit more overexposure this year, Hansbrough will gain ground. But I doubt he'll catch Redick in that dubious honor.
For what it's worth, it makes sense. Redick embraced the villain role. He was a lightning rod. Hansbrough is pretty bland persona-wise. It's easier to "hate" Redick because he was more in-your-face about how good he was.
It's part of the reason he was so fun to watch for us.