I give the Microsoft conference a 3. I didn't watch the EA one but it's EA... so it gets a 1 from me.

MS: 3
EA: N/A (only watched a part of the conference)

No. No need for that complication. 5 point is perfect.

EDIT up to here....

MS: 3
EA: 3

If I could give half grades I'd give Microsoft a 3.5.

MS: 4
EA: 1.5

Xbox 4
EA 2

Xbox: 3
EA: 2

EA - 3
Microsoft - 3

I'm going to give EA a 5 because I'm sure most of the listed ratings are "I'm going to hate on EA." There's more than a few 1/5's. Did you guys even watch EA's conference?  Atleast Anfebious admits it.  My opinion on the event was a 3/5 though. 

EA 5/5

Microsoft.2.5/5  *edit*.  I've edited this three times already going back between 2 and 3.  Decided I'd just go with a 2.5.  It doesn't deserve a 3, but doesn't deserve a 2 either.

Ubisoft.  1/5.  As awesome as the Tom Clancy Rainbow Six reveal was, the terrible acting trying to make it seem like an actual game in progress was absolute ass and was a huge annoyance.  The rest of the show was pretty bad also, so I'm going to have to give them a 1/5.  I'd say 1.5 at the highest.