It actually works! The wider surface area of the frying pan means the water gets hotter and the pasta cooks faster.
This video actually recommends putting the pasta in the pan while the water is cold.
This works best when you’re just making pasta for one. It’s as easy as putting pasta in a bowl/mug with enough water to cover it, then microwaving for a few minutes (it’s trial and error, not gonna lie), stirring every minute or so.
This video says that you will know that the pan is at the perfect temperature when the water forms two beads. Carefully wipe out excess water with a dish towel before you pour in the oil.