Nah. Neither Twyford nor anyone else claimed that all those with Chinese sounding names were foreign owners/buyers. What he claimed was that nearly 40% of the houses sold by (presumably) B&T over a four month period went to people with names common among Chinese, and that locally resident people with these names comprised only 9% of the Auckland population. The equivalence between particular names and Chinese ethnicity was demonstrated at around 95% in a separate study testing the methodology.