Typically when importing clips from my Canon 7D I have the following workflow:
In the Finder...
Create a new folder in the Finder with a descriptive title (Camera A 7/4/12)
Create another folder inside that one called EOS_DIGITAL
Copy the entire folder structure over from the card
In FCPX...
Choose Import Files
Choose the Folder you first created with the Unique Name
Select Copy Files to Final Cut Events Folder and Import Folders as Keyword Collections
This may seem like an unnecessary step for some people, but I like to be more safe than sorry with footage, particularly when on a production. This method creates a backup outside of the Final Cut Events Folder and keywords Camera Angles on import. It also typically keywords the clips based on camera model and manufacturer.