I'm mobile optimising a site with media queries. As I understand mobile browsers are generally quite modern and can handle CSS3 etc well. So does this mean javascript reliance for the mobile version isn't too much of a problem? I know how to find stats on desktop users with no js, are the same stats available for mobile usage? Thanks 
Javascript reliance an issue for mobile optimised sites?
javascript;mobile
As Raynos said, Andriod devices and iPhones/iPads are just fine.You can even use jquery mobile in order to take advantage of events that exists only in mobile devices, like touch, tap, rotate...Relying heavily on javascript is never recommended however, ie, your website should work with only HTML and CSS. With less features, effects, but should work.Another point to observe is that many mobile devices uses opera mobile/mini. Opera plays nice with javascript. So, the number of mobile devices with absolute no javascript support is decreasing day after day.