Cold temps can hurt track times...cold air isn't always the best. The density of water in the air is an effect to...
An internal combustion engine runs off air/fuel, not air/fuel/a bit of water
How do you know you have been to the track more than he has?
I ran an 11.1 at a 1000ft. track my first time ever driving the bone stock 04 Mach 1...I know that is the equivalent of a low 13...so I'm sure with an experienced driver behind the wheel of a 4v/solid axle and good weather/track prep for grip, a high 12 is possible.