HELP!!!!! OLE DB vs ODBC and SQL 7.0

I am looking for some info from Microsoft or any “Published” articles for the differences in performance between OLE DB vs. ODBC connecting to a SQL 7.0 db. Our App is written in VB. We have a db that grows by about 1 Gig a month and we are still using ODBC and RDO to connect to the db. There is a lot of data that goes between the client and the server. I have seen it where just under 1 Gig (Yes Gig)(Static Lists) of data has gone between a client and the server in a 24 hour period. So I need to prove to the “Higher(?)” up that we need to migrate to VB6 along with OLE DB and ADO now and not later. HELP!!! 🙁