Even if you've never played irelia before...

Your chances of winning a ranked game with her is above 50%.

You don't have to have any practice on the champion or mastery or whatever. Just by picking her you are automatically going to have a higher chance to win than lose.

I'm not trying to hate on people playing irelia, or discuss irelia balance at all, but the sad fact is that in her current state she fits the definition of a freelo champion.

Edit: ok maybe i didn't make this clear enough. If you click on the link, you can find a bunch of statistics about irelia top in plat+ elo. One of these is winrate by player experience. Her winrate is above 50% at 1-5 games played. Most champions are below 50%, some are far below that. Irelia is not and for two reasons. 1 of them being that she has a really low skill floor. The other being that she is overpowered. And to those that want to dispute whether she is overpowered or not, she has nerfs on the pbe. Why? Because she is more powerful than a champion should be.