confirming coverage?!?!?!

Sounds like BS to me. I guess it depends on the shop and insurance company.

Sometimes those shops want to get cheap replacement parts to save money and it takes awhile. Maybe its a stall tactic while they are waiting to get cheaper parts.

Confirming coverage means just that. They are looking into seeing if the accident is covered by your policy or the policy of the other party. It should not take long to confirm coverage because when I was an adjuster it took me a day or two. Call them up and ask exactly what they are confirming. Did you get a new policy recently or change the coverage?
Before any loss is paid for, the adjuster has to confirm if it is a covered loss. For example, they don't want to pay out on a claim if you do not have collision coverage.

Call the insurance company and ask them.
This belongs in talk, not tech.