I visited last Fall and had a similar experience so I will agree with maximus82.
Grad students seemed to be treated well and were very open with their experiences with the department/faculty. DGS is very bubbly and warm. EVERYONE I spoke to came across as terribly honest as to what to expect from Bloomington, IU, and of course the department (which I loved). The department as a whole is fairly diverse in terms of race, gender, and even sexuality to a certain extent. All in all, I was largely impressed though when I visited it was raining.
BTW, I ACCEPTED THE OFFER! Anyone else?