not the case...Hillis is still the number 1 guy at Arkansas. the game against Vandy was simply a case of the D keying in on him, and the coaches used that in the first half to spring other backs. he is FAR AND AWAY the best back on the Hogs' roster. also, Leonard is still a fullback. he and Hillis are very similar, in that both are very versatile and often line up at different positions, ie. TB, FB, TE, and in the slot.
Burk split carries last year as well, and Tre Smith looks to be the most talented of Auburn's backs. however, it appears that Auburn's coaching staff is using him more as a third-down back because of his hands and tremendous blocking ability, despite his size, when picking up blitzes.
Kyle Bell looks to be emerging for CSU. in their two losses, he was clearly the best back on their roster, averaging nearly 5 yards a pop. and if talent means anything, he will become the featured guy.
also, there's Jayson Bird at Idaho who was the starter before breaking his collarbone this past weekend. but that's it at the D-1 level, as far as i know.
a thing to note however, is that it appears that the white running backs around the country suffer from being too versatile, if that is possible. they are all willing to block, they can all catch, and they don't bitch when they don't get enough touches. their unselfishness is often part of the reason their coaches aren't featuring them enough so far this year, or so it appears. aside from the fact that Heaven forbid they feature a white tailback, anyway...