I definitely second that, and the source of the problem is the same as that with WYSIWYG editors: tables. I've solved the problem by making things like tables

I definitely second that, and the source of the problem is the same as that with WYSIWYG editors: tables. I've solved the problem by making things like tables editable in another content management module and including it in the WYSIWYG editor as %%%DATA_TABLE1%%%. WYSIWYG seems to only work for me when I only allow the client to choose h1,h2,h3,etc.. and bold and italic. If you're just doing that, the WYSIWYG editor is fine and there's no need to try to teach your clients Textile. Of course, this all depends on who your client is...