yes, I wrote a post in my blog: http://communities.vmware.com/blogs/vm-support/2012/03/27/vsphere-5-e-mac-address-arbitrari
It is in Italian but it is very clear just see images.
Let me know if you have done deeper test.
Many thanks
Sam
samcer| http://about.me/samcer | http://www.vm-support.it/ | @samuelecerutti
