Not to be devil's advocate here, but I quote the guy in that forum:
"The SVT countor was a joke. Ford tried to make a performance out of a economy car and failed miserably."
I would argue that this statement is subjective to one's terms of "success". If one was to define success as building a car which was fun to drive, and offered performance not commonly found on cars of the same price range, Ford was successful.
However, from the business end of the stick, I think Ford failed miserably. I have a hard time thinking they made any money on the car whatsoever based on the amount of engineering$, the cost to run the SVT ops to support the car, and the $ paid out in warranty claims/TSB's.
Furthermore, I think that it seems like SVT owners fall into one of two camps: they will definately buy another Ford/SVT product, or they will ride the bus before buying another Ford/SVT product.
I personally think that Ford failed when it built the SVT because they didn't build longevity or quality into the product they way they should have. How many Maxima's blew their engines when the SVT was in production, or had their synchros self-destruct. And the whole "bang for buck" is a complete farce because the car depreciates so terribly.
For a failure, it sure is fun to drive though and never ceases to put a smile on my face or garner looks when it is driving down the road. If only it was worth something and I didn't feel lucky because I have 75K and my motor hasn't blown up yet and I am only on my 2nd tranny.
Of course, if one was to define "success" as how it stacks up to a Grand AM when its time to hit the Autocross, that is another story