http://www.icefaces.org/docs/v1_7_0/tld/index.html

Looking at the TLD for outputLabel and outputText, I see that outputLabel has:

onclick false false java.lang.String No Description
ondblclick false false java.lang.String No Description
onfocus false false java.lang.String Javascript code executed when this element receives focus.
onkeydown false false java.lang.String No Description
onkeypress false false java.lang.String No Description
onkeyup false false java.lang.String No Description
onmousedown false false java.lang.String No Description
onmousemove false false java.lang.String No Description
onmouseout false false java.lang.String No Description
onmouseover false false java.lang.String No Description
onmouseup false false java.lang.String No Description

and outputText has:

onclickeffect false false java.lang.String Effect invoked on onclick event
ondblclickeffect false false java.lang.String Effect invoked on ondblclick event
onkeydowneffect false false java.lang.String Effect invoked on onkeydown event
onkeypresseffect false false java.lang.String Effect invoked on onkeypress event
onkeyupeffect false false java.lang.String Effect invoked on onkeyup event
onmousedowneffect false false java.lang.String Effect invoked on onmousedown event
onmousemoveeffect false false java.lang.String Effect invoked on onmousemove event
onmouseouteffect false false java.lang.String Effect invoked on onmouse event
onmouseovereffect false false java.lang.String Effect invoked on onmouseover event
onmouseupeffect false false java.lang.String Effect invoked on onmouseup event

whereas other components have both sets supported, both the javascript callback and the effect firing.

It should be looked at how much that's just a doc issue, or an actual feature issue. And the non-effect ones should have text descriptions, instead of just having "No Description".