Based on performance to-date and Coach Cal's definition of "demonstrated performance", there are simply none at this point in the season.
Both Skal and Murray will likely be drafted in the lottery (Skal on potential and Murray based on rep), neither has performed on an elite level thus far at UK. Several players have given glimpses of elite level play, but none have played consistently at an elite level.
There simply is not a John Wall, Anthony Davis, MKG, KAT, Boogie, i.e., a game changer, or even a Marquis Teague or Jorts, i.e., a player exceeding their skill level, on this team at this point in the season. In addition, there is no Darius Miller type player coming in off the bench to provide a spark and energy.
Besides an absence of elite level talent, a "will to win" seems lacking at this time. And point guard play has been inconsistent at best. In all honesty, this team reminds me of some of the better Tubby teams--very good but by no means great.
Having stated the above, it's still early in the season and Coach Cal's teams generally improve significantly as the season progresses.