Someone once said we share something like 30% DNA or a carrot.
Recent findings show the difference between humans and chimps to be orders of magnitude larger than was thought up until a year or two ago. Chimps and gorillas (and hominids for that matter) are/were intelligent enough, but they are unrelated to us other than possibly via similar design parameters. Dolphins and whales are bright enough for that matter, but are clearly not related to us.