Originally Posted by 4TehNguyenyea they dont use the correct and/or dirty washing mitt or drying towel. Using clean microfiber mitts and towels wont swirl the car
Some Lexus dealerships that I have come across in my area actually have the "soft cloth" car wash machine. If your car is quite dirty, basically swirls are induced in the car wash process.
Car wash without proper procedures and tools should definitely mar the paint as your car ages. Also a proper car wash takes time and patience. It is not something most dealerships could afford.