DataReader ordinal-based lookups vs named lookups

Question

Microsoft (and many developers) claim that the SqlDataReader.GetOrdinal method improves the performance of retrieving values from a DataReader versus using named lookups ie.

Answer 1

Any difference will be more than outweighed by maintenance overhead.

If you have that much data that it makes a noticeable difference, I'd suggest you have too much data in your client code. Or this is when you consider use ordinals rather than names