Looking at a silly ad for a two round mag holder, I saw one with one mag with rounds forward and the other with rounds backward. I've actually seen this at matches with beginners. They cited the ads and picture. Then, I was chatting with an officer that I know and saw he had the rounds facing backward.
I did that instinctively until a class. But I'm interested. The officer was taught and thought that the rounds back was ergonomically easier and instinctive using a full grip of the entire hand on the body of the mag. I was taught that with rounds forward you can check first round seating and it guides insertion better.
So - for my curiousity for those in the know:
How did the dichotomy in views of placement develop?
Is there any real empirical research on errors and speed?
Have competitors examined this - perhaps anecdotally? Are there real world incidents were position A or B led to better or worse outcomes?