jQuery vs Zepto vs jQMobi - which one is the fastest? (not jQuery)

jQuery vs Zepto vs jQMobi - which one is the fastest? (not jQuery)

Today I stumbled upon this test:

http://www.codefessions.com/2012/08/performance-of-jquery-compatible-mobile.html

It appears that jQMobi is much faster than jQuery mobile :(. I also tried their website on my good ol' Galaxy S, and yes, indeed it is lightning fast! 

Will performance be the focus of the jQuery mobile team?