I think this list encourages fraud.

There are only two companies in your list that have actually shipped:

BlackArrow and BitFountain.

The others:

KNCMiner - science fiction story, they have not shipped anything they do not even have pictures of their products.
t13hydra, terrahash, ryepdx, burnin - rely on avalon ASICs which have not yet been produced.
Butterfly labs - have taken orders of millions of dollars, have not shipped in 1 year, most likely a fraud.

Our company has tried to purchase 30000 IC from Avalon. The law in China is to sign a contract to purchase the merchandise. We asked them for this and they gave us a bogus address in Beijing and confessed that they do not have a company. For this reason I would be very careful regarding the Avalon ASICs.