Most of the jobs I've applied for after I've graduated college, I was able to get at least an in person interview, and several times, was able to juggle between several offers; I've only applied to roughly five or six jobs in my whole career so far. Why? Because I actually took the time to look at their website, see if it was something I was interested in, and even come up with work-related questions that I could ask them in my cover letter.
Though, I would still say that it's a numbers game, but you still have to make a decent effort for each job you apply for. It's almost like dating, in a way.
I was able to get at least an in person interview, and several times, was able to juggle between several offers
This alone suggests you were in a somewhat different situation than that of the author. Resume carpet-bombing is what people seem to eventually do when they aren't getting offers.
Some people (such as myself) have a hard time landing interviews for some reason[1]. During my final year in college, I sent out no fewer than three dozen resumes to potential employers (all of whom were hiring); only four of those companies asked me to come in for an interview.
[1] Note that that "reason" was no doubt due to my inexperience and not knowing how to properly market myself at the time.
Not getting contacted back can many times also be a fault of the company hiring. Sometimes it takes weeks to hear back, sometimes they want you to stop by tomorrow while you clearly wrote you're on the other side of the country.
Just another indicator not to take job hunt too personal and making sure to look into every opportunity available.
> after scores of weeks of silence, you'd start blanketing too.
Actually I wouldn't, but my situation is probably different than most people just looking for a job. I wouldn't let it get to weeks of silence. I'd just move on.