While it depends largely on the estate, the answer can be yes. For example, if someone contests the Will, it goes without saying that the process has the potential to drag on for many months (or even years).
Furthermore, the longer the Estate Administration process takes the more it will cost. Once again, this is why some people create a Trust instead of a Will. With this approach, they’re able to save their loved ones money (and time and stress) on the process.