The optics were horrible, it sounds like he had a fairly strong case, and for those of us who knew of him starting from his works like Scribe way way back when, well, we're inclined to believe his story.
All we know is that Google made an offer he and his lawyer chose not to refuse, but as long as they thought they were going to win in court before a jury and all that, it had to have been generous, although I'd imagine it wasn't as generous as his original ability to to participate in the IPO and beyond.