I have never seen them mention Bush but I have been told by a very reputable coach that there are similarities between Bush and Winter.
Mills and Franno mentored under Dennis Johnson who was a former athlete of Bud Winter at San Jose. Dennis was responsible for bringing the Bud Winter program to Jamaica.
Look at drivephase’s old journal, can’t remember which one but he outlines a whole year of training from Wisconsin-Lacrosse. It is extremely similar to what the Jamaicans are doing. Lots of tempo and overdistance, lots of accel and sled and block work. No peak for indoor, really only a single peak. They clearly have a very similar philosophy as a program.