1. I'm not going to argue about Apple's defaults here. It simply isn't germane when the college board has full control over the inputs and iPhones will make up a significant portion of test takers.
2. I think you don't understand what the College Board is. It's a single organization that administers test. This isn't something each university needs to deal with. They make and administer the test to all college-bound students in the US each year.
3. There are plenty of existing open source decoders, and all major open source graphics programs already accept the format (GraphicConverter, ImageMagick, GIMP), in addition to all the major OSes (Windows, Mac, iOS, Android).
2. I think you don't understand what the College Board is. It's a single organization that administers test. This isn't something each university needs to deal with. They make and administer the test to all college-bound students in the US each year.
3. There are plenty of existing open source decoders, and all major open source graphics programs already accept the format (GraphicConverter, ImageMagick, GIMP), in addition to all the major OSes (Windows, Mac, iOS, Android).