The missed approach phase includes an initial height loss margin of between 130 and 160 ft depending on aircraft category.
But to answer your question, I've not been anywhere with obstacles in the missed approach area in an aircraft with a climb gradient of anything approaching the dismal 2.5% on which the missed approach protection is based.
For both of those reasons I'll stick to my belief that altimeter error is likely to be considerably more critical for the final segment of a non-precision approach than on the missed approach segment of a precision approach.