Ummm, as I came up from my lab, I remarked to my wife--I need another 6.5 digit meter. My remark came about exactly because it seemed the quickest way to see how that 1043 circuit was doing--I have no way of precision logging more than one source at the moment. What I have been doing is flipping from back to front on the meter....sigh.
Wife was not amused. Discussion about budget. No new meter coming.
So, I've logged reference outputs only. Have not done the same on 1043 outputs. I do have good logs of the exepected standard deviation on my LTZ1000 references and LT1027. So I could hook up the 1043 and look at the SD. Should be correlated, right?
Also I completely trust that datasheet.
Seriously, I've compared the 1043-implemented instrumentation amplifier (first page of datasheet) with an AD8429 IIRC. The 1043 showed better CMRR, which was nice.