Vignetting and metering...

I did a quick search around the web, but I couldn't find anyone talking about this particular problem (if it is one).  I've often noticed that different lenses might require different exposure compensation, etc.  It occurs to me that if you are using a prime lens with a wide aperture, especially a wide angle, if has dark fall-off towards the corners (vignetting).  Since today's camera meter with the lens wide open, this must impact the exposure calculation to some degree.  If you end up shooting at the wide aperture, then the metering may well be bang on, but if you are stopping down to f/8 and the vignetting is gone - you may well end up with overexposure.  Just another thing to think about, but at some point I'm curious enough to do a quick test with my prime lenses...