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. Your restorer should spell out both ratings plainly and record them in the project file.
Managing Carrier, Contractor and Family
A good project lead updates the adjuster, chases phase approvals and gives you a realistic move-back date. On day one, ask who your single contact is and how often they will check in. A vague answer to that question is a warning sign.