I was a tech at a dealership for just over 7 years, and while I always appreciated clean, well cared for cars, of the 22 other guys that I worked with I'd say about 30% cared about the condition of the car.
Most techs are paid flat-rate, so time is both your friend and your enemy. We had one guy who was one of the best techs I've ever seen work, but he had no clue about cleanliness. He'd carry around a shop rag in his back pocket that he'd change about once a week.
That rag would clean brake drums, rotors, valve covers, transmission pans, differentials and fenders - he just didn't "get" car care.

Again, incredibly smart tech and did everything perfect, but just didn't care about the appearance of a car.
So, it's hard to say - some do, some don't. Most guys will pay attention and go, "Wow, this is in great shape, I'll be a little more careful," but some will go, "dammit, I'm already an hour behind today, I gotta make some time!"
So, it's like just about anything else in life - a crap shoot...