Exponential: characterized by or being an extremely rapid increase (as in size or extent)
Diversity: the condition of being diverse : especially : the inclusion of diverse people (as people of different races or cultures) in a group or organization
Conclusion: RCI offers a rapid increase in the inclusion of diverse people?
I guess they are trying to say that RCI offers more variety, but wouldn't it be simpler for all involved to just say that?
Experiential diversity is actually 'in speak' for some - the young business school grad who was responsible for CupGate 2008 probably came up with this recorded message.