This is true, I think. Most Civ players haven't played 100+ hours yet and mostly on deity and so on. This forum skews quite heavily power user, which is fine, but it also means it is a skew. Overall the reviews are positive, and most of these are likely from the typical casual Civ player who has played maybe 10, maybe 20 hours so far and probably has a few head-scratching moments but hasn't been pushing it hard to find various exploits and so on. Firaxis is more concerned about that mass of players than they are about the 5-10% hardcore enthusiasts, really, although I am sure they will use the feedback from users here to improve the game -- the timeline isn't as urgent as it is for people here, because, again, most people haven't burned through 100+ hours on it yet, so aren't feeling as pressed/frustrated yet either.