Computer geek? Oh we have some advice for you alright (just kidding)The only way I know of to affirm a cam swap is the way it idles and drives. If you are at idle and the car feels like it idles rough but the tachometer isn't jumping around then you might have a different cam. I would think the car would shake more at idle with a different cam.
I think the setup sounds capable of 13's. I don't know about the MID 13's though. If the alleged track time is so important you should have actually seen it do this. If it doesn't run a mid 13 take the car back to him 
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'91 LX convertible , T-5, Centerforce Dual Friction, MSD Blaster Coil, FR 9MM wires, 13* timing, 1.6rr, ported/polished/milled stock heads, 1.94/1.60 stainless valves, March Performance Pulleys, K&N panel, 1"spacer, BBK shorties, 2 1/2" off road H, Summit 2 1/2" catback
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