Where do you think it stands right now? Is it like more in the JQuery/Prototype league or the Sproutcore/GWT/Cappuccino/Pyjamas league? I haven't used YUI much

Where do you think it stands right now? Is it like more in the JQuery/Prototype league or the Sproutcore/GWT/Cappuccino/Pyjamas league? I haven't used YUI much. Just tabs and other basic stuff around a year back. So would like to know if it's becoming more like the other desktopUI-like pkgs. P.S: I'm learning Sproutcore right now.