a mainstream reviewer will spot a lot of 'flaws' that our fans don't register as they are sucked into the addictive play. This is why most of our user reviews are 9/10 while our mainstream is 7/10.
Speaking as someone with a reasonable amount of experience in reviews both in print and online, you'll find this is almost always the case.
A reviewer gets a game, and reviews it. Chances are - especially on the bigger sites - it's just handed out to them. They bring their own bias of course, but not as much as the buyers.
Buyers have already paid money for the game. This alone is enough for people to rate something higher as they try to justify their purchase. Buyers are also already invested in the idea behind the game - chances are if they weren't going to like it, they wouldnt have purchased it in the first place, especially as you have a demo out.
I'm not saying that means Altair doesn't deserve 9/10 - it deserves whatever a person thinks it does! As you know, I think it's a pretty solid game and your marketing has been top notch. I just think you'll that the whole 'user reviews are higher' thing applies to just about any game, even the crappy ones.