Hmph. Maybe they're quicker from a stop, but the two ser's (both current and old school, probably stock) I've had a chance to run with on the highway didn't seem any faster than our Duratec SEs. Only thing I've done to my car is modified air box with K&N and removed the res. In the '02 case we were nose to nose from about 50 to 85 when I started to gain a little bit then I shut it down due to space. In the 90's case (couldn't tell the exact year but recognized the body style) I slowly pulled away in the same range as the first.
I have seen some modded ser's that would tear a new one for most any car though.
