If you compare BitMain to any other Mining company; They are the only ones without any real Pre-orders (I don't count waiting a bit for S2 / S3 / S4 / S5).
Show us such a comparison with ASICMiner then.
I consider the gen 1 Prismas to have been a preorder because they took so long to ship; and when they did ... Hoping AM will redeem themselves on their next offering with the new chips.
I do think it is important to consider than AM has been selling miners for ~ 9 months longer than BitMain. I got a bunch of their block erupters a few months before BFL managed to deliver my preorder jalapenos.
With the AM equipment I would say Gen 1 blades were good, usb erupters were good, gen 2 blades with or without backplane were good, cubes I'm not sure I didn't buy one, and Prismas were epic fail.