In the Hyper-V Environment of vFoglight (in Foglight for Virtual Desktops - for vWorkspace) I see realtime performance data on Network & Disk IO for 2008 R2 SP1 Hyper-V Servers, but for 2012 Hyper-V Servers, the Network and Disk IO is not realtime.  The graphs are delayed by ~ 30 minutes and the performance indicators (spinning dials) are greyed out.

Any idea what would cause this?  Below are images of 2008 R2 SP1 & 2012 Hyper-V hosts as seen in the vFoglight components of Foglight for Virtual Desktops.