Native speakers speak faster than normal because the teachers would say Thailand is slow. Make us accustomed to listening to and is not familiar with the accent of a native speaker.
Native English speaking teachers earlier than usual because Thailand would speak slowly. We are accustomed to hearing slowly. And not familiar with the accent of a native speaker.
Native speakers speak faster than usual, because the teacher will say slow Thai, we get used to listening to slow. And not familiar with the accent of a native speaker.