Its not like we're trying to say every tuner is better then everyone else, its that they have more experience. I would certainly trust Nate to give me a good tune (better then I could do, at least), but I wouldn't trust Ed at EQTuning because he's a moron.
I would venture to say most of the people on the board are smart enough to pick a good tuner over a bad tuner, and when we talk about tuners, we really only mean the good ones.