Once of my colleagues asked me which Group Policy Client Side extensions (CSEs) get their Setting data in the Active Directory Group Policy Container (GPC) rather than SYSVOL's Group Policy Template (GPT). From my research into the inner workings of Group Policies, the CSEs that I have found are as follows:
To complicate matters slightly, there are two CSEs that store their data in both the GPT and the GPC
All of the other CSEs have their data stored in SYSVOL's Group Policy Templates (GPT) folders.
I hope this helps someone else :)