Yup. I was using the 200-400VR and I can't hand-hold it except in an emergency. I posted some pics of Sandhill Crane chicks (now somewhere near the bottom of the page) that were taken handheld and VR saved the day, but I wouldn't want to push my luck.
I have been having a heck of a time with motion blur...I think the camera and 70-200 is just a tad bit too heavy and I am unable to hold it still...I have to play more w/ the monopod, but i still move. I need a good tripod...next on my list..LOL