Well, that is the first time I have seen that interpretation of Revelations...and I have seen a slew of different interpretations.
While a nice interpretation there is no real way to back up that idea.
A better place supposedly in revelations to find the USA, since Revelations is all about symbols, is when some interpret the people of Israel are fleeing and many are saved on the wings of eagles(symbol for the USA).
"And to the woman were given two wings of a great eagle, that she might fly into the wilderness, into her place, where she is nourished for a time, and times, and half a time, from the face of the serpent." Revelation 12:14
None of us can “back up” our ideas when it comes to Revelation, as you are right, it IS a book of symbols. I simply see us as the most Christian nation on the planet and hope we can make things right before this time comes. I’m hoping that the reason we aren’t explicitly named doesn’t turn out to be that BO and his friends have turned us into a third-world nation, a 250 year “blip”, that just didn’t matter.