Maverick has three car trains and Velocicoaster has six car trains. That's twice as many people on the ride with each train. Only reasons it could have consistently the longest wait is Intamin unreliability, or sheer popularity.
I'm not so sure about 42 second dispatches, but this will be one of the easier trains to load. The seats are wide open, and the lap bar conforms to many body shapes so there won't be anything like we see over at Hagride. I think it's feasible to dispatch every 60 seconds, but don't ask me to do that PPH math.