Applied at Taco Bell for Unknown

I had a job interview at McDonald's last week where I waited about 10 minutes before being seen. Now, I'm at Taco Bell for another interview, and it's been 15 minutes past my scheduled time. There’s hardly anyone here, just one person inside and a couple of cars in the drive-thru. I’m starting to wonder if waiting this long is typical for fast food interviews. In my previous interviews at clothing stores, I only had to wait a couple of minutes. I’ve read that it's common in fast food and retail for managers to be busy and for interview times to slip, but I feel like someone should at least acknowledge my presence. If I hit the 10-minute mark without any update, I might just check in at the counter to see what's going on.