I confirm the OP's statement concerning the rate differential at the airport Cadeca based on experience within the last week. This is a change from as recently as January. Sure, it's not the end of the world, but as an attitudinal thing it should be avoided. I resent being regarded as a cash cow to be milked at every possible opportunity.
Change the money you require for immediate expenses only at the airport and the rest at a bank!
20

davfitz
Pro tip