I think their responses have changed, as well. They have to in order to “keep up”, so to speak.
Seeing that their explanations for denying various Catholic doctrines no longer hold water/are no longer convincing they try some other approach rather than simply admitting they don’t have a leg to stand on.
For example, the whole petra argument against Peter being given greater authority than the other Apostles. Their old argument about the word petra in Greek and the big rock/little rock argument has pretty much died out. So, now another tack has to be taken–not a new one–all the arguments have already been made, but some old one, that no longer worked in some other age, is taken out, brushed off and renewed as if it was a sure fire arugment Catholics cannot get around. But, again, it gets soundly refuted, so another argument as old as the hills is produced to try to silence Catholic apologists.
They’ve gone so far as to deny the Incarnation by calling Mary a mere vessel, as if she never conceived Jesus but he was simply dumped into her body. It gets more and more bizarre the more some need to deny Catholic teachings just because they are Catholic teachings not because Catholic teachings aren’t reasonable or in any way diminish God or draw men away from worshiping him. For some it’s irrational hatred fueled by the will not to believe because in believing they’d have to surrender their will to a higher authority than themselves–something they are not willing to do.