The intent of the post is to start a conversation and to have people take another look at YUI. After using jQuery for years in both small and large projects, I took another look at YUI when 3.4 was released and I've really been impressed. I don't think it gets the credit it deserves, mostly because YUI 2 was such a beast. I realize I'm missing a lot of concrete reasoning in the post, but that's primarily because I didn't want this to be a conversation about the right and wrong ways, or simply a syntax comparison.
Then add some concrete reasoning and comparison. Do some work. Fuel the conversation. Otherwise the only thing left is the assumption that you do not understand the differences between the two tools. I'm a YUI-hater and jQ-fan, so I appreciate what you're trying to do, but it needs some substance.
edit:
I don't mean to come off dickish. I started out writing my own AJAX libs in 2002-2003, started stealing some good ideas from Prototype in 2004-5, eventually trusted my fate with jQ in 2006, and have facepalmed every time anyone recommends we use YUI since the day of its release. It's like the worst of both poles...it is neither a fluid, lightweight swiss-army knife like jQ, nor a well-constructed application framework like ember. Instead it always seemed to be a rigid set of off-the-shelf components that appealed to people who liked to talk about design patterns but not actually build anything.