What does separate her from your average Flickr user is her technique and her knack for catching the Decisive Moment.
Go back and look at some of the pictures in the article. Now imagine having taken that photo 0.2 seconds later, or earlier. How many of them would've been as good? How many would be completely different and completely mundane? Knowing, seeing, and capturing the Decisive Moment is very, very hard, especially in the 50s and 60s before the advent of autofocus, auto-winding, and auto-everything.
She's also compositionally very competent. This is something that's harder to appreciate unless you're into photography yourself and have seen a large amount of work. Unlike most amateur street photographers, her photos are frequently not about the subject, but rather interesting light, textures, and geometry, in addition to the subject matter.
Now just stop, and look at it. Think about the person shown and what they might be thinking about this woman coming up to them with a camera.
She really had a talent. And the fact that she hid it, only to be discovered by chance after her death, makes it fascinating.
It's all of that and more. Her technique in exposure, action. composition is wonderful. However as I am browsing her portfolio I keep finding myself delighted in her ability to reveal hidden worlds in the mundane.
Take for example this child playing in the dirt. He's been caught in the act, of what is surely an innocuous game. But he is wearing a jumpsuit, a coonskin cap and has a pack of matches, it speaks of so much mischief. http://www.vivianmaier.com/portfolios/travels/?pid=122
The OP post/link wants to run scripts / load stuff from all over the place, which I wasn't gonna OK. This one ( vivianmaier.com ) is OK tho, and hosting some amazing photos.. She had an amazing eye.
1 - http://www.messynessychic.com/2013/02/18/found-at-auction-th...
It is a very good look back in time