I was actually very surprised at the amount of folks that simply didn't respond _at all_ -- meaning not even an _acknowledgement_. The folks that I did hear back from were great, though. Nothing ever actually worked out in my case, though.
Even though I've been in this industry awhile, the _luxury_ of being sought after in the job market still shocks me. Every time a recruiter reaches out to me on LinkedIn, even when they're clearly spamming, it is still mind-blowing. Every time I get a casual job offer from friends or acquaintances who are hiring on their teams, I'm flabbergasted.
Back in the day, I would've been thrilled to hear even a "thanks but no thanks."