If you were spot on with your shifts and he kept up like that, he had top be fully bolted with a really good tune, and possibly corn/meth as well.
It takes a fully bolted speed3 to keep pace, maybe slightly edge out a stock 5.0. He must have had the driver mod for sure to keep pace at such a low speed dealing with wheel spin.
A lot has changed in the tuning world for the Speed3's, and there are many holding 350-400whp on stock motors just fine. It's the tiny k04 that keeps most of them around 300whp.
Good run OP, it's usually a run like that, that will get the credit card out in a hurry for some go fast parts, lol.
'13 CWP MazdaSpeed3-JBR RMM, HTP 3.5" Intake, M2 Full Length Catless DP, 3 Port Boost Solenoid, Cobb Access Port, HPFP internals
First stock turbo MS3 in the 11's- 1.688 60' 7.6@91 firstname.lastname@example.org 3/15/14 Orlando SpeedWorld 3.5" intake, Full Catless DP, 3 Port Boost Solenoid, Weight reduction, Slicks/Skinnies, Upgraded HPFP, RMM, 50/50 E85 Mix
email@example.com firstname.lastname@example.org 1.853 60' 1/18/14 (stock intake/exhaust) 80d rmm, hpfp, slicks/skinnies, weight reduction, e85 mix