Yes, any growth IS definitely a positive sign, but I would prefer if it started growing in the right order; roots to support the leaves, leaves to support the plant and finally a spike to celebrate the whole growing party.
Trust me, I'm happy about this and at the same time a bit frustrated since it, according to me - the human, is doing everything in the wrong order!
Edit:
My Phals seem to like the whole "Oh, lets get new leaves everybody!" and forget about the whole root thingy until someone points it out.