I recently filled out a customer satisfaction survey for my local grocery store. One of the questions asked was, "Were you greeted by every employee you encountered?" The available options were push 1 for yes and 2 for no. I pushed 2, but I wanted there to find a way to add, "But that's a good thing."
I have been to stores where every employee I encounter has greeted me. And it's completely overwhelming. It's one of many reasons why I do all possible shopping online. Part of this is based on a need for sales - if you interact with the customer, you have a better chance of talking them into more purchases. But part of it is also an attempt to make the store seem friendly, to make it all a positive experience for the shopper.
Totally doesn't work for introverts.
It works against introverts.
If I go into a store just to browse and find myself greeted by more than one worker or asked multiple times, "Can I help you find something?" I am much more likely to leave as soon as I can, without buying anything. On the flip side, if I am allowed to linger uninterrupted, to examine all the options without being shadowed by salespeople, I'm more likely to make a purchase.
Ideally, in a world that catered to both introverts and extroverts, you would be greeted as you walked in the door and asked if there was anything you needed help finding. It's nice to have that offer right off the bat. But then, after that, you're left alone. Employees could still wander the store to be available if somebody did need help finding something (or, better yet, be at some sort of centralized location where I could go and seek out someone for help if I needed it - help desks are fantastic - I'd be OK with either option), but they wouldn't interrupt the browsing process.
There are enough introverts out there that being greeted by every salesperson shouldn't be an automatically positive thing. And yet... somehow it is. It is distressing to me to hear questions like that one on customer satisfaction surveys and know that the employees of that store are being encouraged to disrupt and distract the introverts around them, all in the name of friendliness.