From Delta's pilot recruiting Facebook page. Looks as if they're trying not to "United" people:
"Presently we have extended Contingent Job Offers (CJOs) to pilots for classes extending through the end of April, and we take that commitment very seriously. Some of those pilots, specifically the ones starting this coming Monday the 16th, and Monday the 23rd, are already inside the window where they’ve had to give 2 weeks notice to their employers to come work for us. For those pilots, as they were told on the phone yesterday, class will be held, and they should report to Atlanta as scheduled.
For classes starting outside that two week window, a final decision has yet to be made, and we have to ask those pilots for their patience. We hope to have that decision this coming week, possibly as early as Monday, and they will hear very soon after we know."