PS. By the way, when flying in the US with a sensitive altimeter, an error of +/-75ft is allowed, therefore when your altimeter reads 200ft yo may well be only 125ft above TDZE...which is not necessarily AGL. Not the time I'd like to risk getting any lower.
Yes but don't forget that the glideslope is "safe" on a precision approach. If your altimeter overreads by 75 ft and you're still on the glideslope, your go around may be late but you won't hit an obstacle. By contrast, if you're 75 ft low on a non-precision approach, that comes straight out of the 250 ft obstacle clearance.