This is very dubious - the Glassdoor stats at http://www.glassdoor.com/Salary/Google-Salaries-E9079.htm have 1,500 entries for Software Engineers that max out at $190k and average $100k.

The position above, Senior Engineer, averages $130k.

There doesn't seem to be an incentive for 1,500 people to understate their earnings by 50%+ on an anonymous poll, especially a poll of engineers at one of those most engineering-centric companies in the world, where corrupting a dataset would likely feel akin to high treason.

Not inclined to trust second-hand information from one individual - sounds like they're either working at a much higher level than regular programmer, inflating their salary by including perks/stock/etc to make it seem higher, an extreme outlier, or just lying (people who tell their friends how much they earn in casual conversations also sound like the kind of people who would inflate that number).