You need to speak to NorthernBoi. I'm pretty sure that he has had huge losses.
A friends OH was doing SW and he lost 14lbs in one week! It's pretty well known that men generally lose weight quicker than women.
I think it all depends on how much you have to loose. I lost 3lbs in my first week but other people have had huge losses - a man in my group who has quite a lot to loose did 13lbs in his first week. Good Luck!!
I lost 4.5 lbs my first week. When I was in my 20's (in the mists of time!) I would lose 7lbs, but that entailed very little food!800 cal diets were the rage then! I must say that SW actually gives me the most consistent and best losses I've ever had, and I'm never hungry. What I need to do now is keep going!