Think reeeeal hard for a sec. First, are you sure you did the best you could researching this company? If you want them to be your client, knowing more about their demographics ahead of time might help. Second, this team you sent... Could it be you found the best personnel for the job, or is it possible some of them were chosen because they look a lot like you?
The point is you have a chance to both overcome the client's bias, while maybe confronting your own. Pay close attention to the demographic makeup of your clientele. And from there, attend to your own choices in sending them a solution team.