No. You are still right at the threshold voltage. Grab your voltmeter and see what you have across the blower leads.
I agree it's poor utilization of that device tinman. However the op is driving a fan through an RCA jack, so possibly just a few hundred mA. That device will switch a low current (say 200 mA) even at 0.2 volts above the threshold (not shown on datasheet but I can calculate this indirectly from other the parameters - and using worst case rather than typical parameters too). Poor utilization of a 60 amp device though. ;)
You need a 5V signal on the gate to switch it on fully.
Again, it is if you need to efficiently control up to 60 amps. I suspect the load current here is going to be very much lower. Let me say that overall I agree with you though, he is operating WAY too close to the worst case threshold.
fordfanboi, if you can find an alternate mosfet with a worst case threshold voltage of 2.5 volts or even lower then it will make your circuit a lot more reliable. Either that or just use a BJT.