That was a great and informative article, even though it ended up making me feeling bad that I chose Fusion over Parallels.
The VM only has one virtual processor.
You may be correct about using Boot Camp, but there is a reason for virtualization instead; some of my workflow move over to Mac OS X and I find myself more productive when I make use of various OS X applications not to mention the fact that my VM doesn't have any "fearware" running, saving on resources because all network traffic has to go through OS X.
I pointed earlier that my processor were idling 50% of the time even when the VM/SQL Server was busy, so I'd expect it to not beachball so often, but it does, presumably due to two OSes fighting over I/O on the same drive (?).