Diversity is a very subjective area for Pitt students, and what you hear really depends on who you talk to. Numbers speak for themselves-there is a large white majority at the University, and many people are from Pennsylvania or the surrounding areas. If you're coming to Pittsburgh from one of its many suburbs, you'll probably be impressed with the number of different people you can find. The same is true of the Oakland area, which is home to a lot of schools that are even more diverse than Pitt. For those from other cities or very diverse areas, however, the University itself may seem depressingly homogenous.
While diversity isn't a major issue around campus, there are many student groups available for minorities to gather and hold activities, promote causes, and socialize. In addition to groups based strictly on ethnicity, there is also a wide range of interests covered by these clubs. Religion, politics, athletics, music, and hobbies are all very diverse areas around Pitt, and these can sometimes be the best way to make new friends. You'll find that students have a huge range of backgrounds and beliefs, and there really are many niches to fall into. If you want to have a diverse social circle, it's entirely possible at Pitt; you may just have to look a little harder than the people you first run into on move-in day.