Winstun
Agreed. However there are "chunks" of G in the US which do not meet that criteria and to which the Avweb item might have been referring to (?). So as a rule IFR ops would always be in E (or ABCD).
This is obviously not the case here, nor I suggest ever will be. Therefore there will have to be procedures in NAS if IFR is to take place in G. On this basis alone, we can never say it will be the same!