Yes, it's a straight A/B split where leads are coming in and alternating which email is being sent. It is a triggered email in response to a form fill. Leads come in rather regularly throughout the day and the email is triggered.
I work for a small digital marketing agency and it's relatively easy to get buy in for email initiatives. I wanted to do a complete overhaul of our email design and I simply laid out my ideas, backed it up with industry stats and more specifically stats of the slipping performance of our current email campaigns. After I made my pitch the Creative Director tasked our new designer to work with me to create new email designs. This is a project we're currently working to role out now.