Interesting
First off, don't be downed by your track times. The point of the track is to run your car before and after any changes.
Secondly, there could be a few things you can check. Throttle Hang, appropriate air pressure in your front and rear tires (amount of tread; but that's obvious).. I'm sure there's more I just can't think of at the moment.
If we're talking about a stock automatic Non SVT Duratec, that number sounds to me to be in the right time frame. Before any modifications to my car, my 0-60 mph time was something like 11 seconds.
