I'm not sure I follow. Why are you only focusing on the US? This was launched in many countries. Granted not at the same time but that's why I said take the aggregate of each launch day.
You dropped the "Asia" from that. "America and Asia". Also looks like I forgot to mention the other regions in this comment (mentioned it in another one).
Sigh. This would have been easier if we had real numbers. Let us all test our hypothesis. Oh well.