I go to a restaurant for the UX: a date night, the atmosphere, getting out of the apartment, people watching, hanging with friends, etc.
Downtime is the point! It is supposed to take time. It gives me a relaxed period of time to talk with the people I'm with while drinking beer/wine and waiting for the food to arrive. To enjoy the experience.
Converting restaurants to a twitter/facebook 30-second attention span experience seems like a net negative de-evolution to me. I don't play with my phone while I'm at the table with other people - I think it's rude as hell - but Dave does that all the time I suppose.
Giving me a wham-bam-thank-you-ma'am experience is not what I want. I don't have children or am in a giant hurry, but it sounds like that's where he's coming from. Perhaps that's a bigger section of the population than I expect.
But, there's a reason why McDonald's has pictures of food as the menu and Ruth's Chris doesn't.
edit: That said, I do wish restaurants had a better idea of who their "best" customers are and all that jazz. I just don't think dropping iPads at every table is the right way to go.