There is already an answer for this question in our Reddit http://www.reddit.com/r/nem/comments/1w6sgk/completely_fair_distribution_equal_shares_for_all/
I will copy it here :

"
 Yep, the fundraising has some incentives built so probably not perfectly fair. But when we start the genesis block, every stakeholders have an exactly equal footing- the term "completely fair distribution" indicates the fairness at genesis block not at the fund raising. That's being said NEM fundraising is still much better than some other cryptos
"