Our cloud provisioning system is able to rapidly deploy new servers after orders have been verified. The setup time for a VPS server actually varies depending on if you are using a Linux or Windows operating system. On Linux based servers you should see the VPS online within 15-30 minutes. For a Windows based server you will see the VPS online within 1-2 hours.
The force driving server virtualization is similar to that which led to the development of time-sharing and multiprogramming in the past. Although the resources are still shared, as under the time-sharing model, virtualization provides a higher level of security, dependent on the type of virtualization used, as the individual virtual servers are mostly isolated from each other and may run their own full-fledged operating system which can be independently rebooted as a virtual instance.