IOPs size for hyper-V VMs

Hi,

I have few hyperv 2008 r2 hosts hosting about 20 VM's or so each. I have a SAN providing VHDs to VMs. 

The VHDs are differencing and not fixed size. I am in the process of finding out the I/O size hitting my SAN.

My question is :

If I get the Avg Disk Bytes/Transfer for the drive in host machine, would it be the proper IO size hitting the SAN?

Thanks for help in advance.