(...) a fairly small subset of non-US-resident individuals who: a) receive lots of calls originating within N. America, and b) are willing to jump through hoops to set up SIP (or conventional) call forwarding solutions outwith GV in order to route calls originating in N. America to an international destination
then I can see no practical benefit to obtaining a GV acount from outwith N. America at present - GV neither offers international numbers, nor allows forwarding of a V number to an international termination point AFAIK. @Volt - either I am missing something, or you are trying to out-pedant me :-)
*technically* I suspect you'd be in breach of your licence agreement wth Google if you were to obtain an account by this subterfuge (though I haven't read the agreement they presumably make you accept during sign-up, so I may be wrong on that).
- but the point of doing so somewhat eludes me?