I wanted to share some stats from a recent email we did to High School juniors and seniors. It appears that mobile and desktop are now at 50/50. Below is a report from five days after the original send date. We generally see that mobile peaks early on, then desktop catches up later on down the road. We typically see a desktop tail of about 30 days, with the mobile tail only being about 36 hours.
We are sending them to a two-step form, and only tracking when they complete. Mobile users are getting a mobile friendly version.
Let me know what you guys are seeing in the comments, or feel free to ask questions.