(just read the 2nd paragraph. the rest of the article makes the rather obvious point that, if you solicit based on confidential company information, 16600 won't save you.)
This article (and most of the rest of the information I found on the Internet) is referring to solicitation of customers, not solicitation of employees. The few sources I found [1][2] indicate that non-solicitation agreements for employees are very much enforceable, but only if the employee directly reaches out (if the current employee contacts a former coworker about a job, that's legal, and ditto for the former employee's new employer).
[1] http://www.pashalaw.com/legally-poaching-employees-company-a...
[2] http://www.nolo.com/legal-encyclopedia/understanding-nonsoli...