Do you mean they are not right because the app does not save a screen from anything? What if you are using your iPhone to project something on an plasma screen where a screen saver can save a screen from "burn ins".
I am really interested in your thoughts.
As such, yeah the name is a little misleading.
My point is that XScreenSaver is a proper name, and by now should be considered to have earned its name.
iOS does not support screensavers. The app's name is misleading. It seems pretty cut and dry to me.
Off topic: As a child I loved to look at screen savers that I manually started for hours wondering how they work and how long it took to build them...