Turns out the stepping was out of sync after all.  I updated the TechNet post.
I am receiving the following error in Hyper-V 2012 (RTM build): Hypervisor processor startup failed (APIC ID 0x6, status 0x1035).   Further processors in the system were not started. More detail can be found here: [URL] 
PE 2900 & Windows 2012 Hyper-V Error