I am not saying this is wrong but I've been making that on 200Mh/s on slush's pool...
It's not wrong. Just do the math.
What you're missing is that the network power is not yet 500TH. By the time ASICs hardware is available to someone who hasn't yet ordered, it likely will be.
OH CRUD (this forums needs a *facepalm*) I saw GH/s not TH/s my bad. Ya the investment isn't worth it, it would only be some what worth it for those people who receive the the models in the first few weeks.