I believe the producers may have been thinking this would be an opportunity to break stereotypes and bridge racial gaps. I'm not sure it won't end up looking more like they are creating controversy between the races - for ratings, of course. It's an experiment, let's see if it blows up the lab...
there's only one true "reality" show in my book... the Anna Nicole Smith show I couldn't find it in English but this about sums up what I think of pretty much 'all' reality shows: http://www.youtube.com/watch?v=kISwvr1yzSs