When minions get left Alone
I entered a practise mode to test some other feature. This meant that I left the lanes untouched, with minions toggled on. I was surprised to find that blue minions managed to push a fair bit better than the red minions - by 15 mins, the outer turrets of bot and top had been destroyed, with the blue towers hardly touched. Furthermore, after leaving the minions for another 7 minutes, the red minions hadn't at all pushed back - it is fair to say that blue minions would have won the game (I may test this in the future).
I wonder if this is to do with the minions AI, or whether it is the fault of the map - I noticed that mid lane was much less affected (can we view this lane as a control group?) so it could also have something to do with the pathing around top and bot, possibly also the inhibitor.