I've not been to Scream, but my wife is a hair stylist who once worked at Rudy's Belltown. Just like any other salon, your cut depends on who does it. If you liked your barber the first time, you can request them the next time by calling in advance (though you still may have to wait: it's hard to reserve your barber because their clients are predominantly walk-ins). By looking at the styles of the staff, you'd think all they do is punk/rockabilly styles, but they're all trained stylists/barbers, so most can accommodate individual needs.
Here's the rub: they are trained for volume, hence the bad reviews. Some of these stylists are doing 20 cuts in six hours; the more cuts you do, the more tips you get, the more incentives and bennies the company gives you, etc. Rudy's also pushes the staff to move product, so, your barber is a commissioned salesperson, too.
I feel bad for the barbers (though, they can make good pay) but they are given no employer paid benefits (insurance, paid time off, etc.) until much later in their tenure, and have to work very intensively. Some of the more aggressive barbers would also hoard customers, making the atmosphere a bit of a customer quota competition - again, the more cuts, the more pay, etc.
My wife left there because, for someone who just enjoys doing hair and is focused on quality, the assembly line and salesperson approach doesn't work well for her.
I hope that explains a little from the Rudy's perspective.
And, yes, your cut with tip will be around $22.