It's better than you think. And will be especially against Iowa State. Iowa has been good at home in recent years. Look at last year. They only had 4 losses (2 of which were in their power slide at the end of the year). And they were close: 69-71 in OT to MSU, 69-76 to OSU, 74-79 to Wisconsin, and 63-66 to Illinois (bad).
Is it better than it used to be? Yes much better. I expect it to be loud against Iowa State, but that's because it is big game and it's a rivalry. I guess it's just that when I hear the term "hostile environment" Carver is not one that comes to mind.