Fine. They're measured in fractions of a round, then. We're still talking seconds here--you just can't pin them down to the exact second in each instance.
The "Full Round" spell? How long do you think that takes to cast?
Guess what: Six seconds.
Water Bob, as much as I enjoy dissecting bad math, I'm going to cut you off here. At the knees.
Before you pursue this "multi casting" digression, show me a D&D 3.5 spell, of any class, any level, from any WOTC book, that has a casting time of 2 seconds. Or 4 seconds. Or 5 seconds. Or 1 second.
When you can do that, we can proceed with this. Until then, you argument about "if the spell only takes two seconds" is meaningless.
Back to an earlier digression: You say it's "only logical" that a person could swing a single blade, effectively, as frequently as they could swing two blades effectively.
Please explain your logic, in mechanical terms. (I'd hate to be accused of being too narrow minded, and thinking only in game terms, after all.)
Regressing to the original point: You say that it's "only logical" that a person could use a single, two handed weapon like a bow as rapidly as they could swing two separate weapons, one in each hand.
Please explain your logic. In mechanical terms. To a man who has both fenced and scored well in archery tournaments.
Please.