Well, for starters, the headline's wrong in the January 5th New York Times story about Voice over IP.
So, while the rest of the article presents some facts, it seems the big issue, and maybe the only issue that anyone comes up with as a reason not to go VoIP is 911 service. Funny, no one complains about that problem when it comes to the wireless cell phone market where.
The big reason why you're not hearing to many negative comments from carriers is they all know it's their salvation. That's why the only business issue they raise when it comes to companies like Vonage, Packet8 or Voice Pulse tends to be about termination charges.
When the big guys aren't fighting the inevitable, you know they are all getting ready to head in that direction.