Maybe. Or you could invest the short time you said it takes to come up to speed, do that, and call them back. You'd be much more valuable to them and should be able to get a job more quickly with higher value to you.
I'm sure you're right but on the other hand I'd then declare myself as having not enough value. I find it already ridiculous which amount of preparation some companies ask, just for a simple interview. Doing even hours (or days - in case of a lib) for making a good impression on the phone is just insane. Interviewing with 20 companies would then be a half year full-time job.
On the other hand taking a few days to get to know something is still waaayy better than taking months for the exact same thing. But yeah, that's just over the top for recruiters who just want to go through a checklist.
On the other hand taking a few days to get to know something is still waaayy better than taking months for the exact same thing. But yeah, that's just over the top for recruiters who just want to go through a checklist.