Keith - yep, bison, moose, grizzlies survived but the Americas lost over thirty genera of large mammals (elephants, rhinos, giant ground sloths, armadillos the size of a VW, bigger buffalo, a bunch of large predators, including sabertooths, a very large bear and lions) within a few thousand years after humans arrived. We had a large mammal diversity comparable to Africa until that time. Same thing happened in Australia and New Guinea, including huge lizards and snakes. We wiped a lot of very large birds (e.g. moas in New Zealand, dodos on Mauritius), and large tortoises on many islands, as soon as we arrived. The process was slower in Eurasia, presumably because it took a long time for the human population to increase and the animals had some time to evolve behavioral responses. The story has been the same all over the world - when humans arrived, first the big stuff went, then a lot of smaller stuff especially on islands, due to things liked deforestation. Haiti and other Caribbean islands are prime examples.
