So very few hardware manufacturers in the Bitcoin ever delivered more wealth to their clients despite making grandiose claims. BFL was probably the biggest loudmouth of them all.
The only mass production hardware manufacturers are Bitmain, Avalon, KNC and BitFury. Bitmain is the best.
I think he/she was referring to past manufacturers (see title of thread). It seems even in the 4 you listed the opinions have swayed very far. Avalon was loved until Yifu cheated everybody. KNC was loved after their first/second batch and then went to hated.