Interesting... good in one way, but I've just thought about the ramifications for people plagued by EMI who need a higher SNR margin!
In fact, things could get to the stage where an engineer is called out, plugs his little Voyager 105 in, and it connects at 15dB SNR, and the engineer will obviously have to blame the end user's router for the problems, £150 thank you very much
There ought to be an easy way through the web interface of turning it off, if the router's going to pull its SNR stunt on every line. Don't think there's a way to DMT tweak it either
Sorry for the doom-n-gloom post, but it was just a thought that occurred to me!