Maybe this comment was about UK banks which I can't speak to, but we have banks in the US (Ally as one that I'm familiar with and use, but there are many more) that offer high-interest savings accounts at above 2% interest.
Could be keeping a good chunk of their deposited cash in money-market funds (or similar) which are currently paying around 2-2.5%, while providing customers with immediate access to funds with their remaining cash (insulating their customers from the delays associated with buying/selling those funds and so forth).
