I think reviews won't be very high but not because of the games quality but because it is one of these games which some will hate because it's pretty much only about playing online and this will be not enough for some. and maybe because it is super fast and that could be a problem for some reviewers, not everyone can handle that (when i see some let's players and how bad they are even in slower games i can just imagine how bad some reviewers are in titanfall)
but i think the embargo is just standard nowadays.