lol wut?
Uh...yes it does. Weight difference is negligible between the cars. Add 300+ whp and you're gonna sit there and spin your tires just like everyone else. That or snap your axles. 250whp is not enough to drag that car down the 1/4 at a high 12. i don't know who's ass you pulled that comment out of, but it's the most ridiculous thing i've ever heard.
I don't know if you know, but several years back there was a person with a zetec running the times you specified. It was a focus and the guys name was tom. he had 450+ whp as far as i can remember...and lots of traction problems.