Sunius :
^ No you cannot, not on those weapons.
@OP, yes, it still means that. However, there are some weapons that aren't automatic, but they have very high rate of fire. They usually also say "fires as fast as you can pull the trigger".
Yeah, the Jakobs weapons... weird thing is, they still put a rate of fire value on those weapons anyway, but whether it's 9 or 18, it always fires as fast as you can click (which suggests the ROF value provided is just an arbitrary number with no actual effect). But a 12.5 ROF pistol (non-Jakobs) was firing noticably slower than I was clicking, while a 9 ROF Vladof pistol seems to fire as fast as I can click, and it's noticably faster than a 9 ROF SMG on full auto!
The main thing is, full auto weapons with a ROF of more than 5 (so faster than you could click for a semi-auto) are firing much slower than it would be possible to click the mouse button for semi-auto, so the value couldn't possibly relate to rounds/second any more? It seems to be closer to rounds/2 seconds. With the kind of analysis that goes into this stuff on the Borderlands wiki, I'm sure there will be an answer soon, would be good to know!