Right. The cord on the tuner/remote for my Sony Discman has such a warning.
I'm all in favor in "getting the lead out", especially in products that kids come in contact with. Ideally, warnings should be based on the likely exposure, not the mere presence of lead (or anything else). In practice, it's easier simply to condemn everything.
Considering that the blender's cord would rarely be touched (and then only at the plug end), there doesn't seem much point.
Watch it...