There is no official perfomance testing for this specific environment at the moment. The usual remarks for Debian-based guests inside VMWare will apply.
I found one interesting note regarding the paravirtualization drivers on http://vmfaq.com/entry/25/:
From my experience at various VMWare driven environments the major bottlenecks are outside the Linux-guests, but thats probably something you already aware of.
Other readers may find useful remarks in the document quoted above.