Let me explain this one more time, read it slowly:
Just because someone comes out with new firmware for a NAT Router, that does not make it a firewall no matter how many "features" the say they have added - at the same time, it does not mean it's not a firewall. The problem is that unless it's been tested and inspected by some reputable company/organization, there just isn't any way to have a basis for its acceptance as a firewall. Notice I said tested and reputable in the same sentence.
As for secure networks and testing, I design secure networks for a living, and I've been at it for a long time - we've never had a single compromised customer in our history and I've never had a compromised network as long as I've been around. I don't install unproven technology, don't believe in marketing hype, don't believe certification proves that something is perfect, but, I will start with certified products as a basis for consideration over non-certified products, then test them in our shop, test then in the field, and if they pass all of our tests, then I will test them with select customers and then finally will start using them in customer solutions on a regular basis.
Now, before you get your dander up, I have nothing against the new firmware or the NAT routers used in Home solutions, in fact, for home users I always recommend a NAT solution as the first barrier device in their protection. At the same time, I don't believe something is a firewall just because I've read it on Usenet/Web/Print, and I almost never believe marketing speak, and I trust my ability to test and confirm a secure solution.
You seem to be asking me, and all of us, to believe that something is a quality firewall without any certification - and I don't know many people that are willing to risk their business reputations on unproven solutions without independent confirmation.