I would think that the pattern at Oregon might create some uncertainty and mistrust among recruits. If you accept a scholarship to Oregon, you have less of an idea how much playing time you might actually get than typically you would, since Graves is constantly bringing in transfers. Of course Pao Pao was not a transfer. But again, when joining an program that attracts elite recruits, you never know if what looks like a promising college career will flip when your school lands someone even better than yourself.
At Stanford there are two factors that militate against that. First, WBB has almost no record of incoming transfers (Brooke Smith being the exception, as I recall--and she was admitted and offered in the prior year.) Second, it has an academic degree that is worth a whole lot more than a typical school--which encourages students to finish their degree rather than to transfer. Thus Thompson, Sniezek, Carrington, Moschkau, and Dodson all graduated before transferring, and Rooks transferred to an Ivy.
At Stanford there are two factors that militate against that. First, WBB has almost no record of incoming transfers (Brooke Smith being the exception, as I recall--and she was admitted and offered in the prior year.) Second, it has an academic degree that is worth a whole lot more than a typical school--which encourages students to finish their degree rather than to transfer. Thus Thompson, Sniezek, Carrington, Moschkau, and Dodson all graduated before transferring, and Rooks transferred to an Ivy.