When testing SharePoint or any other software that uses Active Directory or any kind of data storage it is important to test with lot of data, data with variations and real life data. One area that is often forgotten is Active Directory, ok you create 10 or 20 test users, perhaps 50 or 100 users called Mr. Test Testson32 or similar, but that is not enough. I like to use some real world data for my Active Directories both for testing and for sure it looks more fancy when doing a demo with SharePoint (especially with these new social features in SharePoint 2013).