HyperV 2012 best practice question (storage of guests)

I was reading this post:

http://blogs.technet.com/b/askpfeplat/archive/2013/03/10/windows-server-2012-hyper-v-best-practices-in-easy-checklist-form.aspx

and I saw two things, one where it says fiber channel is not support and one where is says loopback is not support?

so my question is for a best practice, would local storage (say a local attached raid 10) be considered best practice? or a shared
san lun? and if a san, would virtual stuff like IBMs SVC be supported?