Am I the only one who gets a headache trying to decipher tile layouts like this? My eyes bounce back and forth and I still have no idea how the information is structured or what's important. I appreciate that Google is sharing all of this though.
Ehh.. It's like reading a comic book. Wasn't too hard for me to figure out. I'm not a fan of Material design though, I just think it's tacky.
Polymer is just a library to help you make Web Components. They don't have to be Material Design.