The very busy launch scheme of European Ford models is the reason why RS is postponed. Just look at all the new models that Ford has put in production the last months: Mondeo TDCi 130 bhp, Focus TDCi 115bhp, New Commercial Vehicle Range, Focus ST170, Mondeo ST220, New Fiesta.
Besides, launching the ST170 after the RS would have been a mistake.
The RS will come, but as always with FMC, late!