Well I'm bout 50/50 that Kenny is alive, but I'm also that person that is in denial over Lee. I think Kenny did make it. Reason 1: I heard no screams, but I heard fighting from a distance.
The grunts and the gurggling and rip/tears from Ben's body being eaten by walkers. Reason 2: I only saw one pile of zombies; the ones eating Ben. I didn't see anything else below from the arial view. Reason 3: Kenny didn't want to die. Reason 4: Lost in herd, not said dead. Reason 5: As stated above, made to be ambiguous just in case they need another character for season 2. I think they definitely will, considering the lack of veteran/known/liked characters.
But that's just my opinion. It's good to hope for the best