All I could find was some guy over at gassavers saying that some other guy posted a reference to that effect a while back, but I wasn't able to find said reference.
One thing I can think of though is that this might be a confusion as in 1995 they changed the mirrors to more aerodynamic ones. Here's a comparison between a 94 caprice and a 96. See how the mirrors are like an extension to the A pillar in the 96 pic.
94
96