I personally think there's a correlation between time spent and review. Now, there are of course exceptions to every rule - or in this case; theory - but it wouldnt surprise me if this was true. D2's biggest problem, IMO, will be that it's too similar to D1 - give or take small tweaks that could have been in any D1 patch for the first game - and that a lot of avid players are worn out. Someone who hasnt played D1 as much will obviously be less worn out and show more excitement.