LyX is not WYSIWYG and I'm not sure how to argue this point. What you see in the editor window doesn't look like the paginated output - it's not really up to someone's opinion to decide.
It's not the paginated output but it's close, especially compared to LaTeX code. And I believe many people understand WYSIWYG broadly as a point and click interface with visual feedback, in contrast to writing some code.
