I think you're going to see the range from mid-20's to 36 (composite and math/english scores).
Having said that, the SA's heavily weigh Math and English (Math & Critical Reading on SATs). Because the SA's use the WCS, class rank and ACT/SAT scores are more important than gpa, but the classes you take (AP/Honors/IB), how hard your school is, and other things factor into the WCS. So even if you have a perfect ACT score, if you are lacking in other areas, someone with a lower ACT score but more strengths than you may be chosen.
I hope that makes sense. Don't forget that this forum has a small percentage of actual candidates and/or their parents on it, so you're not seeing the whole picture in terms of comparing candidate A to candidate Z.