[Mgs] Positive ground = more rust?

[Steven Trovato]

I have seen the assertion that positive ground encourages rust, while 
negative ground inhibits it.  I can see how making the body of the 
car be the anode could be a bad thing, in theory.  What I am 
wondering is, has anyone ever seen any real evidence that there is 
any difference in actual practice?  I'm looking for some real 
data.  My googling has not turned up anything other than anecdotal 
information.  Maybe I need to consult with the Positive Earth Society.  Thanks.

-Steve Trovato
strovato at optonline.net