not really. there are people out there who post 1000s a day playing legit. (TSM to ah though so posting / cancelling is real easy)
if i was posting 1000s of ore a day, then i'd agree with you. but i dont.
edit// second point. understand supply n demand. it gains you nothing by posting 70 stacks at once, what it does do is show people that you have 70 stacks and are dropping it all at once and may think that your price is too high and decide to wait.
however if you drop 10 stacks there is not as much ore in the market which justifies a higher price .. so you just post 10, someone buys 5, you post another 5, someone buys 10, you post another 10 and so on.
if you arent going to use an AH bot i'd HIGHLY recommend using TSM. makes AH shit 1000 times easiser.