There seems to be a lot of people saying different things without any source or article to back it up.

See this guide from Google: http://static.googleusercontent.com/...rter-guide.pdf

This will go through everything you need to not only make your website SEO friendly but also user friendly.

Sure, there are a few things Xara doesn't do or could do better from that article and we're working on it, but if it isn't in that guide above then it's not worth mentioning / has no effect on SEO. End of.