Because in all honesty the train can easily hold 500 people per trip....IFFFF the train ride is 5 minutes each way thats a 6000 per hour ride capacity, which is insanely high....lets cut that in half and be more realistic with only 3000 an hour is still crazy, and thats just one train, if they have 2 going back and forth which is the rumor, and lets say that each train could hold 200, which is 4800 an hour.
They won't have a problem I think with long queues with this train IMHO...to give you a basis of comparison, the MK trains can hold up 360 guests, and they have 2 or 3 trains running.
So with 2 trains at each 180, thats 4320 an hour...this train will not be the capacity nightmare some people are trying to make it out to be.