Well, the second part of what you said is correct, however, Delta has established a bridge program with several universities. The scenario is that after gaining the mins and instructing for a set amount of time at those universities, passing all your exams, having a min GPA, etc, you are guaranteed an interview at ExpressJet and then after working at ExpressJet for a set amount of time, you'll be given preferential interview at Delta if/when they are hiring.

I know for a fact that Western Michigan, UND, ALLATPS, and I believe Emby Riddle are included, not sure about which others.

For the next 5-7 years it will not be needed, but as things progress, this might come into play.