Comparing MLB to rounders is ridiculous. I think that Pasta might agree with me when I say that there seems to be an undercurrent of Yankee batting, I mean bashing, in this thread.
Smithsonian tv channel USA is full of huge baseball arenas for thousands of spectators - to watch american rounders! Same for UK netball = USA basketball. Girly games played by men over the pond ;)
cricket balls almost all bounce, which slows them down (but can make them deviate in direction). I doubt any deliveries hit the bat at more than 70mph.
Air resistance slows down cricket balls and baseballs alike.
Well, the ones in shorty shorts playing footy-ball who dive to the ground screaming and writhing in agony if somebody come to close to them seem to be:)