Your friend tested on example games or create empty project and try to run it? It will be nice if he check on something like “Just a single unlit texture over screen with no action around”, to see how much cpu/gpu/ram used by engine itself (without any actual Game).
Tried to check actual hardware statistics and looks like here is still about 20% devices with poor gpu and 10% with 256 ram.
By the way thanks for your contribution, Meathead! :o