They're probably talking about Quicksilver. It's a program, like you said, to speed up the rental process.
If you go to
Alamo, click on Business Travel, then Business Benefits program for US Residents, then click on Enroll, you can sign up for Quicksilver. (Just make up some company name.....it's no big deal)
At Orlando International, they don't have a Quicksilver Kiosk, but a seperate window for Quicksilver customers.
Sounds to me like that's what they were talking about.