How so? I sometimes use the mobile ordering at Starbucks while at the store, I never had any issue with it. I find it to be pretty convenient to just do the mobile order when I bring my baby in the store with me.
I like ordering using the mobile app, although some of the customizing options are usually missing.
You call it impatient, but some people could call it better time management. Why waste 15 minutes of time waiting for a cup of coffee when you can order it on the way there?
Another reason I like these apps is that I hate standing in line for 10 minutes, just to have the person standing in front of me get to the barista and they do not know what they want to order. Maybe it is me just being impatient.....