I believe this, why? Because going to the track so many damn times, I've seen nearly everything. (Sears Point and Sac are both a short drive away)
My friend hit consistent 15 flats in his 93 Civic Si hatch, yes it was stripped, but still impressive.
15.3 is good for an EX, I've seen stock ones do 15.8's before, but low 15's is really good. There might have also been a strong tailwind helping your time, but whatev, good job. :thumbup: