No shit sherlock, really, Fallout 1&2 were in TB?! Damn.... but thanks to u i know that now:)
Really, cut that crap, and stop insulting me.
Saying that APs is simply 'time' gives me hard prove about your intelligence (yes, yours, not any of your chars).
I dont want to give you too many information, u coudl not handle that, but just think abut:
why p90 burst spend less seconds, than minigun burst. (a little help, you have imingun always in position to pull the trigger; p90 not)
why reloading of each weapon costs exact number of 'seconds'. (a little help, compare reloading RL and mauser)
why aiming in head/eyes costs more than aiming in for example arm.
why single shots form bursting weapons, costs 4/5 or similar of whole burst
After u think about it, open your mind to conclusion that APs are artificial feature, to make game balance. No 'time'. Its something more, but im pretty sure that u cant get it with your attitude. No need to explaining anybody, why walking with crippled leg, costs triple APs. Its for your convinient (balanced) play, and has nothing to do with actual speed of crippled person.