CCL: double vs. split valence basis sets

 Sent to CCL by: Joslyn Y Kravitz [jyudenfr*|*]
 Hello all,
I have a question of semantics that I would appreciate opinions on. I have frequently seen the 6-31G* type basis sets referred to as double-zeta basis sets. Technically, they are not double zeta basis sets, but rather are split-valence basis sets because they don't use two basis functions for the core orbitals. Am I splitting hairs here or is it actually important that the distinction is made?
 Joslyn Kravitz