I'm not so sure the experience (of talking to fast food employees?), if you can call it that, matters all that much to people who want to grab a quick bite with their family.
To me the biggest change in restaurants is the norms/expectations of service personnel. e.g. I'll walk into a restaurant and the young hostess might stare at me until I go "Uh, for two please". Or the waiter at a restaurant might make it feel like he's only standing in for his friend and never was a waiter before in his life before I release him back to the waiter social circle going on in the corner. But I can't blame that on "data".