As far as Summer Bird being in AP's league.... They dont breathe the same air
He wasn't in Rachel Alexandra's or Zenyatta's leagues either...when he was racing under their ideal conditions. But under his own ideal conditions, in the slop at 10f or more in NY, he was a superior racehorse.
Perhaps a sloppy track will provide the necessary leverage, but anything at 10f or more seems non-ideal for American Pharoah.