The first rule to sales of anything is "know the product". I don't care how smarmy a salesman is, or how good he is at closing, etc., if I catch him lying or making something up, I both call him on it and don't buy from him. Sales may be a revolving door, but I went to the same dealership to buy my STi only a year after buying my wife's WRX. The reason we returned was because we had a great salesman who both knew the car, and who was willing to stand back and let the product sell itself. The dealership profited from a good salesman, despite them definitely not deserving it.
I was in sales for less than a year, but within the first week I learned all about the product and it's competitors. A salesman has only a few duties, especially when you have a showroom where the customers are coming to you (I went door-to-door, so I have no sympathy for car salesmen). They have to be able to answer questions, and they have to be able to elicit information from the customer. Car salesmen even have someone else doing the closing. How hard can it be? Whomever is telling them they have to blurt out where the extra cup holders are while sitting forward in the rear seat during a test drive is a bigger idiot than they are. And anyone encouraging them to lie must be competing for the sale, because it never works (short of being lucky to find a rube).
No offense to Grayson, which seems to be the exception to the rule, but Subaru dealerships are obviously poorly managed, partially because Subaru of America has no interest in how the customer is treated, and partly due to either greed or a lack of significant profits. Hiring decent people, or even training the new hires to know the product should be a minimum requirement for any business. Obviously, whether it's service, sales, parts, or management, there's clearly no experience necessary. It actually seems preferred. The product sells itself and the dealership's there to be sure you never come back.