Not a dig at OSX users. I have a macbook in addition to a thinkpad running a less common distro in front of me right now. I'm thinking of it in a Bayesian way: if a person is a Linux user or an OSX user, I expect them to know all/most of those tools. However, given that a person (limited to Linux or OSX users) doesn't know about those tools, I expect them to be an OSX user.