I have seen this issue come up before on several sites. Penny-arcade even did commentary on it. It irritates me to no end to see comments about a game before it comes out. I am considering buying a X-Box. I wanted to see comments about Apex. Everywhere I turn there are all these comments and ratings from consumers who have not even consumed yet.
I think the ratings/comments should be locked until a games release. EBgames.com is a great example of this irritation. I think average gamer feedback can be vital, but not in the present state.