Whilst like other contributors, I do not have any figures, there will be a cultural effect in play.
Even in Western countries such as USA, UK and Holland there is an effect where the relatively junior FO might overlook an error by a senior Trainer. However, in some countries where Hofstede's "Power-Distance" score is higher, there is a much stronger tendancy to always think that the senior person is correct. (For more detail, Google Hofstede).
Wasn't that also an issue in a recent Korean report?