I love my DNA you should not have let them talk you out of purchasing what you wanted.
The most likely explanation is that the sales reps got spiffs for selling Samsung phones. For those unfamiliar with spiffs, it's basically a bonus offered on top of commission for selling a certain product or a certain brand of products. When I ordered my DNA, the rep talked about how she loved her s3. I'm just not a fan of Samsung phones.
I worked at a "verizon" wireless zone and we routinely had samsung, Moto, and htc reps come in the store. I will have to say that samsung were the most aggressive as far as sales reps pushing their product. It was irritating since they didn't pay any commission on their flagship phones. They usually had contests, the rep who sold the most s3 and note 2s won a s3 was the last one before I left. I recently traded my s3 thru CL for a dna and it was a straight up trade. Good decision I think.