It depends on the OLE DB provider I think.
It's possible the Microsoft OLE DB provider for Oracle (which is deprecated if I remember correctly) has a fast load option, but the Oracle OLE DB provider doesn't.
Yeah that's what I remembered . May be Yashuvp can check that .
Here is the link ..
http://msdn.microsoft.com/en-us/library/ms141237(v=sql.100).aspx
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SQLBuddy