I ve read that most of the reviews that are popping up online, such as the pc gamer review, were written by reviewers who played the game on a machine that was set up at a "review event".
Yeah not exactly real world testing. PC gamer has confirmed that these issues "pop up" (so to say..) for the them when using their computers and the retail release of the game.
Even console users
are having problems with texture pop in. It might just be a permanent feature of the engine.