I have heard over and over again that having DC listed first is causing customers to not know any better and to choose that over PayPal. I decided to go through my sales and see how they look. Here is what my stats say:
From 5/20/12 when I started DC to 8/28/12, my most recent sale, I have had a total of 30 sales. Exactly 15 were through DC and 15 through PayPal. Of the 15 that were DC, 7 of the sales were to customers not new to Etsy, and 8 customers were new to Etsy. Of the 15 PayPal sales, 11 customers were not new to Etsy and 4 customers were new to Etsy.
What this tells me is that *22 of the 30 sales I had, or 73% the customers made the choice to use or not use DC. Not because it was listed first but through their own choice. The other **8 of 30 sales, or 27%, are unknown. They may have chosen DC because it was listed first or because they wanted to, or a combination of both.