At least from what I have seen, the Valley is much friendlier when it comes to job-hopping than most other markets. Maybe changing jobs every year is a little extreme, but certainly every 2-3 years is not out of the question.
You're talking about something different. The comment I replied to asked what the incentive was to prevent the employee leaving soon after starting the job, such that implementing a policy of only paying out the bonus after 3 - 6 months would curtail such an issue.
