Although this article is pretty old, it's the fact that John pays attention to details like this that makes me completely confident in my choice to use jQuery.
Here is some more recent data (02/03/09):
<a href="http://blog.creonfx.com/javascript/mootools-vs-jquery-vs-prototype-vs-yui-vs-dojo-comparison-revised" rel="nofollow">http://blog.creonfx.com/javascript/mootools-vs-jquery-vs-pro...</a><p>Unfortunately that article doesn't test jQuery 1.3, but you can find 1.3 benchmarks here: <a href="http://docs.jquery.com/Release:jQuery_1.3#Performance" rel="nofollow">http://docs.jquery.com/Release:jQuery_1.3#Performance</a>