It is capable of running trains at 205 mph. Arrival times are consistently hit with precision in Japan, and there has never been a fatality.
I feel a bit skeptical that the same can be achieved here in the USA, much less Texas. Look how many train vs vehicle incidents took place in Houston, one of the endpoint cities of this high speed rail line, before and in the early days of their light rail line.
I wish it does not come true, but I boldly predict not only will there be late trains, and accidents involving fatalities, but also that the first such incident will involve an SUV.