they say there won't be a 'fast' version of that though , just a 'warm' one, as they don't want to hit sales of the fiesta ST....

Which seems silly to me, by releasing it surely they'll sell more cars than by not, even if they do sell 5% less STs. Personally I wouldn't buy a Ka if I was looking for a Fiesta-size car. I'd buy a Fabia II*

*Dunno, not driven one but some Bias is to be expected

Yeah, if I want a "small fast car", I'm more likely to buy another make than buy a bigger car in order to get the fast bit.