Don't know how they get the 120 degrees out of two caps facing 180 deg apart either; perhaps one of The Wise Ones on the forum will chime in.
Too bad AT did not just keep the 180 deg angle. If they did, you could have a variable pattern mic that you can adjust in post like the Nevaton MC404 or Sennheiser MKH800 Twin, but for a lot less money. Two of those 8022s would allow you to do a Double M/S setup for less than $800.