It's not a valid question to ask. The guy titled his thread "Fucking Moron with Computer Source" then posted up front he'd never used his computer as a source before. What stringent comparisons would you expect him to make? Same for anyone else. No one is claiming to have vast experience with computer audio software. They're posting impressions about what they have. What would you like them to compare? Should Al go buy a pc just to try out every possible software solution before saying he likes the way the amarra sounds in his rig? We're individual people in our homes sharing what we like and don't like with friends who can agree or not.
So, why don't you arrange a whole meet of computers for us, all with different software solutions, then set up volume-matched rigs with identical amps and headphones and music that we've all used for a least a few months, so we're familiar with what we're hearing. Of course, you'd have to fly us in, and put us up in identical hotel rooms, guarantee we get the same amount of rest and same good food; have a physician examine us for equivalent good health, hearing acuity, serotonin levels, stress levels, rashes, mosquito bites, personality disorders, etc., and make sure that we're wearing equally comfy clothes and shoes and are not having bad hair days. Kick out the bums who don't measure well, and then let us get to the biz of comparing. I'd bet that within a few posts of our impressions, if someone happened to prefer a more expensive solution to something free, you'd be complaining that we didn't DBT, but if we couldn't hear a difference or preferred a less expensive product, I'd bet my bank account you'd claim our impressions were valid.
Bah.