NFS Thin Provisioning

I am setting up a VDI environment for a customer, and we are using a NetApp filer and NFS for the data store.

VM .vmdk files stored on NFS data stores are thin provisioned by default - Right?

My XP Template has a single 10GB .vmdk file, and when I provision VM's from it the vmdk file is 10 GB not the expected 2GB (which is the used space on the template)

My question is..... Is NFS thin provisioning for VM's only applicable on new, manually created VM's? and not those deployed from tempaltes?

Thanks in advance.

Sean