Its a bit off topic but,
Motion capture results in very realistic motions that can then be applied to Cg characters, Gollum, King Kong are two great examples they dont look S**t in my mind. The cost of motion capture and the subsequent cleaning up of the data are some of the problems.
Also a take in a mocap suite that might have been cleaned up and sorted ready for the animation pipeline might have ended up being determined not suitable by the director and therefore might have had to be hand animated, as the porcess of obtaining the data again would prove too time consuming and costly.
End of the day its up to whats required for the production, if you can hand animate if then do it, if it needs the subelty of the movements required then mocap it (if its cost effective). Ive Just started using mo cap data and its not as straight forward as you would expect, then again this might be me not being used to the workflow.
"No pressure, no diamonds" Thomas Carlyle