Physical processor to Logical Processor ratio

Hi Experts !
I came across this old blog post on Physical processor to Logical processor calculation.
http://blogs.msdn.com/b/virtual_pc_guy/archive/2010/08/13/using-powershell-to-find-the-virtual-processor-to-logical-processor-ratio-of-hyper-v.aspx
The straight formula I see here is
Write-Host (@(Get-WmiObject -Namespace "root\virtualization\v2" -Class MSVM_Processor).count / (@(Get-WmiObject -Class Win32_Processor) | measure -Property NumberOfLogicalProcessors -Sum).Sum) "Virtual Processor (s) per logical processor"
-ForegroundColor yellow
As per this formula, My Hp Blade server BL460c with 2 X Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz, 2600 Mhz, 8 Core(s), 16 Logical Processor(s) can have 2.125 Virtual Processor (s) per logical processor
I have 32 Logical Processors and can have have 68 Virtual Processors in this case.
Is this assumption correct?
Is this formula applicable for even an AMD processor?
Cheers.
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.
InsideVirtualization.com

Thanks Tim.
I got your point.  Its purely on the load on individual VM.
Now we are in the process of implementing Exchange 2013 and as per the technet article, it clearly says  Virtual to Logical processor ratio recommended for Exchange is 2:1. This made me to think again on the processor ration now.
Many hardware virtualization products allow you to specify the number of virtual processors that should be allocated to each guest virtual machine. The virtual processors located in the guest virtual machine share a fixed number of logical processors
in the physical system. Exchange supports a virtual processor-to-logical processor ratio no greater than 2:1, although we recommend a ratio of 1:1. For example, a dual processor system using quad core processors contains a total of 8 logical processors in
the host system. On a system with this configuration, don't allocate more than a total of 16 virtual processors to all guest virtual machines combined.
Its a recommendation from the individual product group and only applicable here.
Thanks for the help.
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.
InsideVirtualization.com

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