America's a big place, there's a very wide range of things that law enforcement do in it.
I think there are demographics that have different experiences than mine, especially when there's a dog involved (who can provide any excuse necessary:)
In Australia I've been stopped many dozens of times for a "random breath test" where they stop every car and make you blow into the device to check blood alcohol.
I've never had one take more than 30 seconds.