I got mine yesterday, but sorry, I am in WA. The comparison between your other sensors would be very interesting.
Klaus sent me his test data when using calibration gases of 0.8, 0.85 and 0.9 lambda using a random sensor (meaning, not hand picked) the maxium error in the data logs was 0.06 *AFR* (for the 0.9 lambda test) and the average error was 0.02 *AFR* or less.
Yes it's only one sensor, but still very encouraging test results and much more precise than the claimed 0.01 Lambda accuracy.
If you would like to see the data, shoot me a PM.