"* The FAA examiners are mandated in the regs with the authority to use any unsatisfactory performance as an opportunity to teach rather than fail and they routinely do so. They are success motivated, as are the TC inspectors. The CAA approach appears to be failure motivated."
This is only true in the case of a proficiency check with operations conducted under CFR 133, 135, 137 and 121. If a maneuver is messed up, the examiner may discontinue the PC, conduct training, then resume the PC. Hopefully the maneuver isn't messed up again.
When conducting a exam for a certifcate or rating (CFR 61 & applicable PTS), if a maneuver is messed up in this situation, the applicant is ineligible for the certifcate or rating sought. The examiner can not provide training and retest the applicant. The applicant must recieve training from a CFI and be recommended again for the exam. However, the applicant may recieve credit for previous areas of the prior exam that were satisfactory (In other words need not repeat the entire exam).
There are give and take in each country in every area of the aviation regulations and training enviroment. Somethings required in the state are not requried by others. (I can only speak of the US and Canada)