If you look at the average delay and the flying times you see how ryanair cheat.
The stats say ryan air is 8 min late and easyjet ius 13 min late on average.
Both ryanair and easyjet do eastmidlands to rome
Ryanair timetabled to takes 2hr 45 min
easjet is timetabled to take 2hr 40min
So Ryanair is no faster it just has more buffer in the time table.