Thanks for the info.
The Zetec-S will be cheaper to insure. For young drivers insurance makes all the difference. The original Zetec S sold quite a lot for the same reasons.
I think both will be popular, but the Zetec S is ultimately a sporty version of the Zetec. It's not really as thorough a job as the ST.
I have on good authority that ST deliveries will be starting in November or perhaps slightly earlier. There may have been a delay but everything suggests Q4 2004 rather than Q1 2005.