I can tell you that for this month there are 70 FOs on reserve in ATL, of those 21 voluntarily bid reserve. On average there are around 60-65 reserves in ATL, so you'd need probably close to that number of people below you. If hiring continues at the pace we have been doing, my guess would be around 6-12 months on reserve. XJT has been getting more new-hires, so reserve time will be a little less there.
Next ASA class is scheduled for May 30 and two classes are scheduled for XJT in June.