Compared to a low 12 sec. turbo Buick, yes, a bone stock WRX is slow.
I ran a 14.5 in my bone stock 5-speed sedan WRX, with 1300 miles on it, full weight (I weigh 250lbs), no icing the intercooler, no raised boost, and 1/2 tank of gas my 1st time to the track with it.
IMHO, not too bad for...