Stacy, good comment. I think your views are actually pretty consistent with Alton's to be honest. He's focusing on social media's core benefit as "online reputation management" while you referred to utilizing it for "building relationships". Both of those are part of the up front customer service angle in my book, whereas the sales come later. So I think if you can simply appreciate what your efforts are trying to accomplish (it might NOT be immediate sales, but rather maintaining your image, engaging customers, keeping your name out there, and building your brand), then social media can be of great value.
Sunshine makes a great point too. You CAN take your SMM approach to the next level by offering Facebook only promotions, for example, which can lead to more direct results (sales).
I think another thing that might be worth considering is what you're selling and what it takes to sell your product. For example, I co-own an upscale hair salon on the side at http://www.ellemariehairstudio.com. Women love talking about their hair, they like to stay current with the latest trends, and they always have another appointment down the road. So from a social media perspective, it's in their best interest to stay in the loop with what we have to share. We might post a Facebook only special for them to use at their next appointment or one of our stylists might post that she's added some last minute hours to her schedule and if anyone has room to come in today she'll give them a free haircut with their color service. So it can be both fun and in your best interest to follow a company such as a hair salon. A company that sells refrigerators, for instance, well, I might not be so quick to jump on that bandwagon so their approach to social media would probably be a little different.

