Clean water left standing for a couple of days can shift to Category 2, which changes what gets removed. That is the practical reason speed on day one matters.
Class matters just as much for the schedule. A small Class 1 loss might be dry in two days, but Class 4 losses in dense hardwood, plaster or masonry need specialty drying and extra days. The restorer should explain both ratings in plain language and write them into the file.
Keeping Three Parties Aligned
The project lead sends the adjuster updates, tracks approvals for each phase and tells you when the house will be livable again. On day one, ask who your single contact is and how often they will check in. If the answer is vague, that is worth noting.