I would be surprised if the sales curve isn't performing very close to original expectations. This car was designed to appeal to a specific performance market which frankly has few followers in the U.S. horsepower focused enthusiast community most of whom would never consider a car with a 4 banger. Toyota and Subaru got quite a bit of positive PR in the beginning which is valued in the marketing world as "impressions", a tangible scalable commodity that factors in the overall ROI.
Like it or not, the only way to broaden the appeal is to find more power which frankly would not be easy or in my mind worth while, doing so the official way incurs costs and comprimises that most existing owners would not appreciate. Now what you do the unofficial way is up to you and many have already found out that the platform is MUCH more capable than most realize.
I would offer some advice to the "experts' who like to add road course commentary but your personal experience comes with a page number:
On a typical track with minor modifications not including forced induction and completely street legal, this car can hold it's own with most of the cars mention in this thread. Quoting tracks like VIR (or Sebring) which pay homage to the horsepower gods does not provide a fair representation. The 2 cars below, one street legal and one not, are much closer in performance than you might believe at a neutral track.
I'd love to stay and chat some more but I'm off to get my ass kicked some more by a few Mustangs
