LOL!!...Yeah,seems that a fast snake is also faster thinking and
can develop a good memory even as to its keepers actions.
Funnily enough a guy at my herp club keeps Black Mamba's and he swears that they are very intelligent and can be conditioned at feeding time...another fast snake!!

I heard this story about coachwhips,can't remember where...that they know when a nest of baby birds are fledging the nest and wait under the nest only to eat the young birds as they make their maiden flight (which usually ends up in a crash landing)...
thats both clever and patient for a snake!!