I've been using the app on breaks at work at nearly half the rate I had been using RIF. Here we see that it still used about 2x the data in roughly the same time period.
The app's great. The bugs are getting hammered out and Lemmy's great too. Can you look into doing some optimising soon?
Edit: To be more specific. RIF used just over 1gig over 10 days of browsing during breaks. Most months hit about 2-2.5 gigs. While connect used 2gigs in 6 days.
I used Boost when I was viewing reddit content. Average usage per week was ~9 GB. I switched, completely, to Connect 3 weeks ago. Average usage per week has been ~6 GB. I don't know how to factor in time of usage to create a unitized data/time metric, but I think you have a similar issue in your reporting. TL;DR No obvious/realistic impacts to data consumption; additional data logging required to quantity appropriately.