Fair enough.
I'd say yes, quite a few do and it doesn't just apply to racial stereotypes. It's worth remembering that stereotypes are created by the actions/habits seen by many.
Take a show we have here called Border Security (It's to do with people coming through immigration and customs at airports). It's amazing how well one particular race appear to understand questions until they've been caught doing something wrong and then suddenly they can't understand english.
Different nationalities/races have certain characteristics which you can call stereotypes if you like.
But acknowledging a stereotype doesn't make you a racist ... although it's a hanging offence in the eyes of some people.
I've worked in a French security situation whereby I'd come into contact with all Europeans plus Brits, Aussies, Americans, etc.
The glaring similarities of people from the same nationalities was a source of amusement for the lads.
In that kind of work you'd absolutely
have to make an instant judgement on everyone who arrived at the gate. The holiday complex held 5,000 and there'd be a constant stream of people coming and going in camper vans, caravans, tents, etc. We had a security staff of a dozen lads and, if you were on the front gate, the very first thing you'd look at would be any newcomers number plate.
Nationality, or the particular region of France, was a big part in deciding how to approach people.
The response to a carload of 5 North Africans, with a Paris number plate, would be, 'Sorry lads, the place is absolutely full'.
To a family with German plates it would be 'hello and welcome, choose your place, number 1773 is free and it's on the riverbank'.
To a gang of Danish bikers it would be 'this a family site but you look like a great bunch of lads so we'll happily let you on, don't let us down or you're off'.
It's all right for people to say you should give everyone a chance, get to know them and don't judge a book by its cover ...
... but those people aren't in a situation whereby serious trouble could ensue if they misjudge the situation.