Suburban Station wrote:so could the leased sets run the route in less time than the new bilevels?
That is the idea. Pretty much, that limits Michigan to a (probably more expensive) lease of Horizons or Amfleets, a portion of the ex-MARC fleet rebuilt absurdly quickly to intercity configuration, or the Talgos. If Talgo America makes good on its hell-on-wheels operating structure, it should be no problem for them to bid.
EDIT: though if you mean maximum average speed, the bilevels stand to be certified for 125 mph I believe. These would be 110 mph only, for the most part.