As a person working with Americans, if I may express my honest opinion, this is BS. Your advantage is the fact that you are professional, hard-working, are able to question the demands in a positive way, can communicate with American management more easily, live in the same time zone and in general you can get on with the rest of American team more easily. I would never say physical location is an asset (although I might be biased as I work for corporations that have multiple offices in various continents, for small startups it might be different).