This is not news. Chase and Visa announced a partnership a few months ago that outlined, among other news, a significant shift of card volume to Visa.
From
Marketwatch:
Chase Merchant Services combines the capabilities of JPMorgan Chase's acquiring business, support functions and extensive card portfolio with a customized processing solution that Visa and JPMorgan Chase will create using Visa's network, VisaNet.
As part of the agreement, JPMorgan Chase also will shift additional credit and debit card volume to Visa, driving more transactions on the Visa network.
Chase has also signaled that its MasterCard-issued business cards, such as the Ink line, will transition to Visa cards. When a MC Ink card expires, it will be reissued as a Visa card.
In this case, I believe that the CSR was on the money.