He thinks that reaction's bad, try watching the crucifix scene in The Exorcist in an inner-city theater in Detroit. I think young audiences not connecting with older material may be true but one shouldn't conflate it with a dumbass audience.
That said, even though I love the films in a non-ironic manner we still snicker sometimes watching old Bond movies. When he smacks a woman on the bottom and tells her it's time to go because it's time for "man talk". Since Austin Powers I can't see the scene where Bond's told "In Japan, men come first, women come second." without adding "and sometimes...not at all".
This is partly why I don't get too worked up with all the remakes out there. I'm sure that as much as we love them and they're legitimately great some of the films we love are probably more dated than we can appreciate if we grew up with them.