Exam 1Y0-402 topic 1 question 113 discussion

Scenario: A Citrix Architect must perform a Provisioning Services (PVS) design for a healthcare organization. The initial design places all PVS farm components in the organization's primary datacenter. The customer asks whether the vDisk can be streamed from PVS servers in the primary datacenter to target devices located in a secondary datacenter in another region while maintaining good performance. The datacenters are connected with a 10 GB link with approximately 20 ms of latency.
The architect recommends against the organization pursuing this approach.
Which statement is a relevant reason for the recommendation?