Many studies are showing up these days on the internet (mostly regarding France, wonder why?), proving that the best tools for recruitment, both for candidates and recruiters, are ‘classic’ job-boards and ads, even spontaneous (but recommended) applications… They point out that tools like Linkedin are less useful.
It would be indeed stupid not to look at ads nor post your cv on dedicated websites if you want to change/find jobs. Let us just not forget that a job search is much more than that. This is too passive: some of us might do that forever and not get any results!