Although I've never had occasion to employ this practice, sometimes a term is just so right, so well-coined, that you can immediately understand what's being described.
William Vambenepe explains the concept
I’ve heard people describing how they use “instance tasting”. Every time they get a new instance, they run performance tests (either on CPU like this paper, or i/o, or both, depending on how they plan to use the VM). They quickly terminate the instances that don’t perform well, to improve their bang/buck ratio.