I say that Kakashi favors Sasuke the most. I havent read the manga and there might be a reason or something but so far, it seems like Kakashi likes Sasuke over Sakura/Naruto.
After the preliminaries, we know that Kakashi trained Sasuke and let the Eibu (cant spell >< guy train Naruto. I doubt Eibu could have taught Naruto much ( I highly doubt he could have taught Naruto what Jiraya did) and then Neji would have probably crushed Naruto. Kakashi knew how strong Neji was from watching the prelim fight and he probably knew Naruto had no chance against him. However...he still decides to help Sasuke rather than help Naruto. (as for Sakura...he's probably given up hope on her...)
So if Jiraya wasnt there...Naruto probably would have gotten beat ( if his kyubi doesnt take over him)
Kakashi~ go diE!!
(actually kakashi is kool guy, i like him )