I have created a VDI pool which spans 2 servers. We have 20 vdi windows 8.1 machines and the servers that are hosting are Server 2012. When I run a speed test on the servers the speeds are fine. If I run the speed test on the secondary servers guest VDI systems the speeds are fine. If I run the speed test on the Primary Host servers (which also hosts Routing and remote access) vdi guests I get excellent DL speeds but it looks like the UL speed is throttled back to 1mbps only.