I have revision 1.0 updated to BIOS F4.
I am running Windows Server 2012 R2 with all the updates applied and the drivers at their latest.
What I have found so far is if I run SysInternal's coreinfo before installing the Hyper-V role, VMX and EPT are indeed present. The minute the Hyper-V role is installed, it is absent.
From reading the documentation, which I had to do a bit of digging for, it seems that having Hyper-V installed can cause coreinfo to glitch.