Well, I think that's a commonality with just about all young artists, in all honesty. When I first starting coming here at about age 9 or 10--a year or two before actually getting an account--I had a PLETHORA of artists that I would copy from--even
trace from, at first. The first one, I recall, was AmberSea, whose art is what originally brought me to BS. Soon to follow on my list of "inspirations" were many other artists, including Pample, SilverDeni, Beauty_Jenna, CatWhoHas14Tails, Cat_Wings (now Zukitz), DragonDrawer (during the brief period that I was drawing anthros), Draco, and more. I did draw my own art-plenty of it-but theirs was just so much prettier I wanted to be able to draw just like them. Of course, I soon learned that directly copying/tracing their art was wrong and stopped doing it, but I still took heavy influences from their art until I began to feel more confident with my own abilities, and a personal style began to emerge. Even now I see styles out there that inspire me--to name a few,
Paperiapina,
GhoulShoe, and
randomkag, and those inspirations can help mine evolve.
Every young artist deals with certain levels of insecurity in their work. They want to be able to draw like the "good" artists. So...they reference their style. Sometimes heavily. If they need help with anatomy, by all means, help them out. If a drawing's directly copied/traced from another, then yeah, it has to go. But if it's their own original drawing with simply a similar style, I'd say just give them time. It will evolve into something more personalized eventually. An artist needs to discover that path on their own. That's what makes it their own style.
(Not to mention that oftentimes when artist try to come up with their own "style" so young and inexperienced, they resort to incorrect anatomy (not exaggerated...just plain incorrect), big "hair", big tails, etc. as an attempt to make it more "unique", which could, for a while, stunt their growth as far as grasping the anatomy goes.)
So basically, a personal style's not something you can learn in one night or that anyone could just grasp from a guide. It's something that takes years of practice and self-discovery. They'll get there. :)