The google definition of electronic now includes "Produced by electronic instruments" as a sub defintion, but what does that mean? Is Jimmy Hendrix an electronic artist? Is Emancipator an Acoustic artist? David Bowie, the Beach Boys, Rush, Bonobo, Sound Tribe Sector 9, Big Gigantic?
So clearly we have to use a qualitative definition which would be subjective and based upon the sonic qualities of an artist rather than the instruments they use.