I read that thread over on DSL reports. I wouldn't call it "excellent". IMO, there's more emotion than productive information. While I agree that Google needs to step up and work with their CLEC to diagnose and cooperatively solve the problem, the part that "Iscream" is indignantly ignoring is that they've either created their own little CLEC (Telengy) or they have some sort of business relationship with it. Think about it: there is no such thing as free beer. Why would they give away those DIDs? They're leveraging that CLEC to make some money on the inbound call interconnection fees, and it isn't exactly a world-class CLEC...free means cutting corners and using the cheapest possible routes. It's not surprising that Google's CLEC might be reacting to that by also using some low-grade/low-cost route to connect. Some of those routes have been known to not pass CID at all, or to mess it up, which is exactly what's happening. I am not an apologist for either side; I just don't feel the same sense of outrage as Iscream...their paid DIDs work just fine.
This is an interesting case study in the free-market and lightly-regulated consequences of deregulating the telephone network. We now have a "you get what you pay for" marketplace, instead of a monopoly, but some people still feel entitled to 1st class service at bargain-fare prices. Millions of people jumped all over MajicJack when it came out. MJ planned to make money on targeted advertising and interconnection fees. The former fizzled out (ahead of its time), and I dunno how much money they make on the latter. The result is that they raised prices and cut corners dramatically, like refusing to connect to many other carriers who charge higher interconnect fees (not to mention the world's worst customer support).
IMO, this GV<-->CLEC<-->CLEC<-->CC problem won't get resolved soon, because of the arm's-length way Google works with its CLEC, for legal/regulatory reasons. Google may or may not feel it's important to nag their CLEC to deal with what is really a very small percentage of their user base.