Well sure, but I always thought that was more from suspension set-up.
You guys might be on to something here, as the '05 Ferrari 430 also shares about a 40/60 ratio as well...
http://autos.yahoo.com/newcars/ferrari_f430_spider_2005/16951/style_specs.html?p=ext
I would still argue that 40/60 doesn't tell the whole story. The dynamics of the weight in the rear being behind or in front of the rear axle most certainly is a variable which cannot be ignored.