There is a conflict of interest with dogie's guide, as he is now an employee of Bitmain, so it has lost a lot of credibility I'm afraid.
Considering the hardware he has received to write guides for, I think that argument would have applied a long time ago for various manufacturers. As it stands, the overview is still pretty a pretty good guideline (you can compare Dogie's top half/bottom half and Bicknellski's list), and any issues people take with it can be read in the actual thread (it's not self-moderated).
The thing is though, how can I be biased for / against every company at once? Patman has a personal vendetta against me, so I wouldn't care too much about what he says. Ps, I'm not an employee of bitmain, I'm an external contractor.