I think it was a 5/5 for an E3 Conference. Perhaps the best conference we've ever seen for showcasing games. But, because of the deltas surrounding the XBox One, I've gotta dock a point.
For straight up games, at E3, there's probably never been a better 90minute reveal.. It was one game after another with no fluff, no "waggle to reload," no dance remix interlude, etc. It was 90 minutes of game reveals, 5 or 6 of which were new IPs, one or two of which were major game reveals (MGS, Battlefield, Halo).
But, because XBox One is a boner of a console at the moment, it's not that great.