I agree with Creekfreak, the rejection is b/c of the cardioid capsules, since they have virtually zero pickup at 180º off axis they can reject an amazing amount of noise that is coming directly from the rear. At a few shows I have been yapping away right behind my mics with virtually none of it being noticeable on the recording.
To my ears, the V3 makes all the ambient noises (crowd, venue reverb) more noticeable, my first impressions when I first started running it (at 24 bit) were:
1) How clean and transparent it sounded.
2) That I could REALLY hear just how crappy the venues sounded that I was taping in!! (TOO tour Nov/Dec 2002). I also often heard chatter and conversation on my recordings that I never noticed while standing just a few feet from where the mics were positioned.
Regardless, I also am really happy with my V3! I like the excellent detail that it brings out in recordings, even though that detail can detract from the recording if there is a lot of ambient sound, when the conditions are right IMHO it is really tough to beat!
Happy taping,
Ben