Nice catch - and you are absolutely right. I have updated the text a little. Does that sound ok to you? I am reluctant to replace the whole page if the issues can be solved by minor edits out of consideration for our translators and non-english speaking users.
Feel free to report more errors and outdated info as you come cross them, there are bound to be lots of them since most of this wiki has been written way before Frameworks 5/Plasma 5. You can also correct or supplement pages yourself if you wish - this is a wiki after all :-)