Did you personally talk to these people you're referencing or did you just read and recite what Google provided?
I've regularly used Douglas barrels for years for big game hunting calibers (to me that means 6MM and above), and I've never had any complaints. That stated, if I'm buying a custom barrel from anyone, I don't buy the lowest grade that they produce. To me that's like buying a Ruger American rifle expecting it to be a family heirloom. In the past year I bought two Douglas barrels in .224" bore to replace a couple of less than stellar factory barrels. Both were definitely a huge step up in quality in terms of accuracy and cleaning ease.
From the Douglas web site in case you were wondering:
GRADES OF BARRELS AVAILABLE
Standard grade is a barrel that meets our dimension specifications but may have a minor amount of curvature. Truly, however, I see barrels in our scrap that are straighter than most factory barrels. A PREMIUM grade barrel is one that has been judged straight in checking. It will be marked with the symbol XX to designate this.
AIR GAGED QUALITY
In the process of checking our barrels all are checked with air gaging equipment. In so doing we find some that are more uniform than others. Those that measure .0001" or less variation from one end to the other are classed as air gaged. This does not mean that should you order a barrel of a lower quality grade that you might not receive a barrel that would have graded AIR GAGE but it does mean that if you specify AIR GAGE you will get a barrel with the tolerance indicated above.
You will find that most of our basic barrels are marked for the muzzle end. In the process of air gaging we mark the tight end as being the muzzle. Some people feel that the taper should be to the muzzle, others say that it makes no difference. At any rate the barrel is marked so the choice is yours.