In new aircraft types just launched I supposed it is common that the instructors/TRES would have minimum stick time on type before they are let loose to train the line pilots. I have just read the thread about the Boeing pilots delivering aircrafts and training pilots at their customer airlines.
However for an established training centre such as Boeing Training in Korea it is indeed a shame they allow ex B737/757 jockeys who have no stick time on the B777 to instruct or check.