I take alot of offense to that.
The only slow 3.8's in my opinion are the pre-99's with single port intakes. 99 saw the redesign of the upper intake to a split port which netted an additional 40HP. This made the rating on a 99-03 'Stang 190HP and an '04 193 due to the fact it was a 3.9L. However the 3.9s suck as they are literally a GT's 4.6 modular hacked up.
As I own an '02 3.8L and have owned both a 4.0OHV and currently a 4.0SOHC I've seen all.
I've raced 3.8L's in both trucks and was impressed. My '98 OHV Ex outran a Cherokee from a stoplight with a 3.73 rear yet was shamed by a 3.8 'Stang (which I will openly admit was being driven by a girl). My 99 SOHC with the 4.10 rear did alot better against a 3.8 a few weeks ago in fact.
I will vote for the 3.8 house till the day I die.
-Andy
D.J.O.R. Netzhauptmann