Customers complain that they didn't get approached or were confused when needing to be rung up for an item. That's why the employees ask people if they need help or have questions.
Apple employees are still friendly and welcoming. There were negative employees in 2008/2009 and there are negative employees now... Apple does have a lot more employees and stores today than it did when Steve was alive and healthier, but there are amazing interactions still happening at the stores.
Not saying anyone is negative, of course there are still amazing interactions. My point is it feels more sales driven than before. As an employee i'm sure you can decipher when someone is lost and looking for help as opposed some dude geeking out.