Absolutely not in my experience, maybe I've just been really unlucky but I can't remember more than 1 Ryanair flight I've been on that was actually on time. Most delayed by less than 4 hours, but delayed.

Ryanair has the very sleazy habit if saying things like "we have just landed at X, note how we are 5 minutes ahead of schedule!" over the PA.

However, they don't make a peep when the flight lands with a delay.

Not at all in my experience

Would you like to substantiate your extraordinary claim with some actual evidence?