Sorry to bring up an old thread, but a Fiesta beating a Focus is far from impossible..
http://m.youtube.com/watch?v=NKdBxR1nErE
This is me against my mate, you'll see he even got off the line quicker than me (embarrassing) and i went past him.. That is when she was just a cammed duratec, fully laden with seats, spare wheel etc..
Fastest i ran was 14.8 that day, and saw a focus rs at classic ford run 14.8.. Realistically these cars aren't as far apart as people think, power to weight and the difference between n/a and turbo are vital..
On a private road pulling from 70mph may well be a different story, but on track and up the strip, i wouldn't be so sure in the focus..
Obviously, everything can be tuned, im just making the point