I can't say that I have eaten in a lot of restaurants in America, but I have eaten out about once every month and a half for the past two years. In all but one case, everyone at the table was served their food at the same time, and, unsurprisingly, that was at a Japanese place. For a culture in which people do everything together, I'm surprised that nobody cares if everyone gets to eat at the same time at the table. Food is served whenever it is convenient for the servers and the kitchen rather than in accord with the customers' needs or desires.
I don't miss sitting down to eat a meal at a restaurant and finding that I was eating 20 minutes before my seatmates because the kitchen and wait staff couldn't be bothered to coordinate.