Most if not all insurance companies need to take quality photos of hail damage. They need proper lighting to have it show up in the photos properly. I wouldn't be surprised if most of the major ones set up more temporary services to help process claims. But to call when thousands of others are calling and expect things done right now just wont happen. They don't have hundreds of people sitting around waiting for a hail storm
Best bet is to give it a couple of days to put in the claim. Less hold time and maybe they will have an action plan in place to help with the high influx of hail damage claims.