Earlier quoted context omitted.
This isn't really a gray area. He stole a bunch of documents on the way out, founded a new company based on IP he didn't own, and then sold it to another company. (assuming google's allegations are true)
I believe that fowlerpower's point is that you should not assume that Google's allegations are true - at least not until they are proven.
However, whether or not he used those documents in an inappropriate manner in Otto or Uber is still up for debate.