He is not counting Butler as a small ball PF. Butler has played that role several games over the past 4 weeks and has been HIGHLY effective at it. He even blocked Vuvecic shot, which IMO was the game sealing play against Orlando.
And Spurs will play alot of small ball against OKC and GSW. He is much more valuable to this team than Bonner is right now.
This is including that KA also has played the small ball PF. Spurs won every game he started at PF. Spurs have LMA, West, Diaw, KA and Butler that all can play the PF position w/ KA and Butler being more situational PFs.