I think if one group was basically in charge of the network it might have a major impact on bitcoins and what they are worth. Distributing the network goes more towards a free market idea, and a decentralized network.
Think about this for a moment. If they did start mining themselves with all of there hardware, and just kept producing more of it for them to mine, would you compete against them with your fpga or gpu? They would kill the market and the network.
That all being said if I were in their shoes I would have kept the first unit and turned it on to make a profit so they wouldn't have to be so weird about preorders and preorder funding for the second batch. If I remember reading correctly the 1 unit given to Jeff makes about $240 a day. They probably could have mined for a 2+ weeks, and proven they had the product while they were producing the remaining 300. Once all of them were produced then they could ship all of them out to people at once and not given anyone other then themselves a distinct advantage (aside from geography and how long it takes you to receive something from China).