I can hand-hold mine down to 1/30th and get crisp images but don't forget that your minimum acceptable shutter speed is going to have a lot to do with your grip and technique as well as the lens. As a comparison my minimum with the VR I was about 1/60th - so for *me* about a 1 stop improvement.
I have used it for a couple of seasons of weddings, and it is a superb lens if your style includes a longer zoom. There is a contrast and sharpness improvement over the VRI and I suspect a significant improvement over the 80-200. In fact I switched to using the 70-200 for smaller groups, and for the B&G alone from my 24-70 because of the quality and reliability for sharp images across the frame as well as the look.
You are always going to hit the limit of human movement so I rarely used my 70-200 down at minimum hand-hold because whilst I can be still the subjects rarely were.
You also get the benefit in the VRII from the VRI (although not the 80-200) of no vignette due to the VRII design being refined to accommodate an FX chip rather than the DX chip which was the only digital option when the VRI was designed. Not necessarily an issue for weddings and portraits but I'd rather add my vignette in post than have it imposed on me.
I typically used the 70-200 at weddings for;
- individual portraits
- back of the church
- close ups during the ceremony
- B&G alone
- smaller formal groups
- speeches
I didn't use it for bridal prep as I was rarely in a room big enough - usually on an 85mm prime for my tighter shots. On the other body it is complemented by a 24-70mm, a 50mm for details shot at f1.4, or very occasionally a 14-24.
