They aren't adding new stops in between existing stops. Trains board and deboard WAY faster than busses. And the link has grade separated track most of the wa

They aren't adding new stops in between existing stops. Trains board and deboard WAY faster than busses. And the link has grade separated track most of the way. So it cannot be slowed by traffic. There's no reason to think it would be slower than it is today, which is to say, often faster than a single occupancy vehicle.