As for what type of detectors they have, it is a simple WTMD (walk thru metal detector). They aren't permanent structures, just portable metal detectors put in a certain spot.
My specific discussion was about the theater of the bag checks. We talked about the futile effort of quickly looking into a bag when everybody knew they were doing it and could just as easily conceal a weapon or explosive on their body. I have personally observed a female wearing a hijab rob a bank saying there was a suicide vest underneath. Do you think Disney is going to ever search anyone wearing a hijab? The answer is no, because they fear the media and cultural backlash. I for one think its entirely necessary to check them 100%. Of course the Disney people were not going to say anything about it, but thanked me for my information (and nothing has changed... so even though they know their security isn't working, it has not really improved}
Unfortunately in the USA we have too many cultural and religious issues to overlook in the name of political correctness.
You want security? Take a hint from the one place that takes security seriously. El AL (Israeli airline). They use methods to stop a hijack before it happens. Notice there has not been an El Al airliner hijacked in a very long time?
But unfortunately their "commonsense" method would never be implemented in the USA.
I have to disagree with Disney being proactive. It is still "theater" or "window dressing" designed to give the appearance of security.