well, I downloaded it and ran it quickly this morning. cool little app, but it can be improved on.
Found a long empty road this morning (where I live, there are a lot) and just took off from a stand still. No revving or anything, so it wasn't a "launch" by any means. I didn't want to go the full 1/4 mile as I was nearing 100mph, so the stats are only to 1000' with the cars weight entered at 3320 and 0% for drivetrain loss, so the number is supposed to be the "at the wheels" number, which is why its so low. I guess with a few more runs, the numbers can get pretty close to what the car is capable of.
