Yes: the acceleration rate of a torque wrench is almost zero, while that of an air wrench is substantial, and it's applied the same way a hammer-drill is, in bursts until the nut starts to turn.

In a previous life as a motorcycle- and occasionally car-mechanic, the order was

• start with a long wrench, 
• add penetrating oil overnight and repeat, 
• curse loudly and add heating nuts with a torch and cooling with water. 
• Failing that, buy some new nuts and cut the old ones off with the cutting torch and a cold-chisel. 

-- 
Alvin Starr                   ||   land:  (647)478-6285
Netvel Inc.                   ||   Cell:  (416)806-0133
alvin@netvel.net              ||