This makes sense. The clock is just another piece of hardware to be virtualized and shared among the guests.

But last time I said that with some pretense of authority, someone shoved me a whitepaper from VMware that said the opposite. Best practice was stated be to sync each guest individually with a completely virtual clock.

I'm not sure I agree, but at least I try to be open to be possibility that there are situations I had not considered. If anyone else knows more about this, please share.