Well, what they are talking about is going into the "Hypergraph" and detatching/editing the time node in the hypergraph node-based view.

So if you select your emitter, and open the Hypergraph-Connections, you will see a TIME node to the left of the flow for your selected item.

This is the global frame time node. It manages the flow of time (in frames) during an animation.

There is one time node per graph (selected objects) and the graph gets all of its time information from its time node.

I'm not a big fan if this technique, as you do not have the tactile feel for visually stretching, or shortening your time via the Trax tool, but some people find it usefull for certain situations where Global time is not a factor in thier overall animation