That's not what I've heard. The whole movie is on YouTube (not the best gauge of human intelligence, I know), and you should see some of the comments there. I showed it to my mother, and, while she eventually came to marginally enjoy it, she complained that it was boring. Of course, she also initially complained, "I hate old movies," to which I replied, "It's only three years older than you!"

Anyway, I do get something of an impression that it's one of those things film buffs "have" to see, like a textbook or bad tasting medicine, that's really good for you but not has to be forced down. Again, I just don't get it. Not only do I find it extremely educational and fascinating to analyze, I find it genuinely enjoyable to watch.