Be cautious while using '-includeusersecurity' in Export/Import Tool
Applicable to MOSS 2007 and SP 2010. Just be aware that while using Export and Import commands with '-includeusersecurity' switch to move a SharePoint sub-site from one site collection to another site collection, along with sub-site contents the security groups and its members of entire source site collection will be moved to the target site collection whether the sub-site is having unique permission or not. As long as the Source and Destination site collections sharing the same security groups and members, the sub-site migration will not show any impact. If it is otherwise, you will notice all the Source Security Groups in the target site collection. After the migration, go to Target Home >> Site Permission >> Click on a Group Name >> then click on 'More Groups' from left menu >> Browse all the groups and you will notice newly added Security Groups originated from Source Site collection. In general, the newly added Secur