My comment comes directly from my experience in the past as a recruiter. We saw a 60%+ downturn in the hiring market From Nov 15 - Dec 31 regardless of how the hiring market was performing in general, and then they would spring back to life after Jan 1 when everyone was back in the office. It takes more than a hiring manager to hire employees.

The slowdown comes from all the moving parts who need to be in place in order to facilitate the transition of an employee to an org.

Think of your average tech hire who needs to (a) go through orientation just like everyone else, and (b) is going to take a week or two just to get his work environment and credentialing set up so he can work with the servers. I'll put my experience on that side of the desk working with dozens of clients against any anecdotal one-offs who got hired late in the year.

You speak the truth. Any recruiter with any experience at all will tell you hiring plunges late in the 4th quarter. It's been that way forever. There does tend to be an uptick in interviewing starting late in the 3rd quarter and early on in the 4th (i.e. now) so they can get the people they need in place for the start of the new year and next year's budget. Hopefully these folks will be able to take advantage of that and if they can't start immediately at least be ready to go at the end of the holidays, and if they've been paid through the end of the year then they can at least enjoy the holidays.

A lot of business in general tends to slow down during the last few weeks of the year. It's sector-dependent, somewhat, but just things like getting approvals from or meetings with people who are 'out' for the holidays impacts even well-intentioned orgs from moving at 'regular' speed when it comes to making hires or signing business deals or what not. It's not a 'negative' viewpoint so much as 'realistic'.