That's actually kind of a funny sample, because it's a mix of three spot mics in the orchestra.
That explains it! I was listening to one of the most well-defined orchestras I had ever heard from a stereo pair...except that it wasn't a stereo pair
Yes, I also found your site and read your FAQ, good stuff.
I have BTW got some great recordings from simple WM61-As soldered straight onto a mic cable with no mods (and only minimal attempt to match caps).
digifish.