2-node circuits Vs 3-node circuits

[Michael_google gmail_Gersten]

> > Also, what if the path length was "mostly 2, occasionally 3 if the end
> > node is not a tor node, but always 3 (2 intermediate nodes) ending on
> > the tor/end node"? Would that help the unpredictable-ness, without
> > causing slowdown?
> >
> I don't get how the end node can be not a tor node.

Most of the time, the end node is something like "Google", and my exit
node talks to it. If, however, the target machine runs Tor, then it
will be the exit node, and the end and exit are the same.