In Bridge CS5 the "Subject Distance" information is displayed for Zoom lenses which report distance information, under the Camera Data (Exif) panel.
In Bridge CS6 either 64 or 32 bit, no "Subject Distance" information is displayed for the same files, which report this information under CS5 bridge.
I have checked that the "Subject Distance" is checked and turned on under the preferences section. Not sure if the data is either not being read or just not being displayed.