The animation speed only applies if your adding an animation.
The scrolling carousel is not considered an animation. You would have to enable easing for the animation to take effect.
You can view an example of the easing with the speed declaration on the jCarousel jQuery plugin page.
jCarousel does not contain any built in easing functions. You would have to include the jQuery Easing plugin or use an inline easing equation like Robert Penner’s Easing Equations:
Query.easing['BounceEaseOut'] = function(p, t, b, c, d) {
if ((t/=d) < (1/2.75)) {
return c*(7.5625*t*t) + b;
} else if (t < (2/2.75)) {
return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
} else if (t < (2.5/2.75)) {
return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
} else {
return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
}
};
To use the above with jCarousel:
jQuery(document).ready(function() {
jQuery('#mycarousel').jcarousel({
easing: 'BounceEaseOut',
animation: 1000
});
});