He sites $165k average for senior engineers (which seems accurate), but its important to note the higher salaries as well - I have friends at Google who are making over $300k. In terms of the worth of a software engineer, the former company I worked at used to bill $150/hour (roughly equivalent to $300k/year salary) in the mobile space. I think that this is more likely a trend though - I don't see it being that sustainable but who knows.