Not really sure what the fuss is about, the have pretty clearly said in the advertising and interviews that the head start was "up to 7 days" I think most of the advertising mentions "up to 5 days". The earlier you entered your pre-order code the earlier you get an invite.
I pre-ordered last week so am not expecting an invite until the weekend.
To be fair, as it is a new MMO launch I am not really expecting a huge amount of stability and solid playtime until after Christmas, but that is speaking from experience of many other MMO launches!