Quote Originally Posted by HDNitehawk
With other lenses I probably wouldn't have noticed this as much but with the 500mm speed is everything hand held.

There's an effect of loss of light if you stop down your aperture by 1.3 stops to get the same depth of field you'd get on the FF (e.g. you'd need f/6.4 on the 7D to achieve the same DoF as f/4 on the 5DII). But if you keep the aperture the same (and live with the shallower DoF on the 7D), the shutter speed should be the same. But in terms of handholding, the narrower angle of view does mean you need a faster shutter speed (e.g. the crop factor applies to the 1/focal length guideline) - in the auto exposure modes, the camera accounts for that, e.g. in Av mode with auto ISO and a 100mm lens, the 5DII will try to keep the shutter speed above 1/100 s, while the 7D will try to keep it above 1/160 s.