"Initial flow only" in MvExtension DLL

Is there a way to handle initial flow only in the metaverse provisioning process using a rules extension?

IMVSynchronisation.Provision(MVEntry mventry)

only has the metaverse. If the object doesn't exist in the CS of the target MA, that could be used to tell if it's an initial flow but all there is:

StartNewConnector("user");

which returns CSEntry.

If CSEntry is empty, would that mean it's now in intial flow? i.e. does StartNewConnector return a fully populated CSEntry if it's not intial flow (object exists in CS)?

thanks,

Alistair