I wish the Accord V6 6MT had LSD too. In fact, I don't get why it does not: the 2001-2003 Acura CL Type-S had it with the 6 MT as well.
All the old school muscle car people commonly referred to this as "posi-track", short for postitive traction differential. But there is a bit of a difference between LSD and a locking diff.....
"Lockers" as 4 wheelers call them, permanently lock the differential to spin both weels equally, all the time. It actually has to be engaged manually, because if you drive on normal surfaces with the differential permanently locked, you will break gears. When you turn, the wheels on normal differentials turn at different speeds in the turn (outside spins faster than the inside as it covers more area in the same amount of time). If your differential was locked, the inside and outside wheels would spin the same and force the difference in innertia to your differential and transaxle. Not good for all those pieces parts.
What lockers ARE good for is getting out if completely stuck, and 4 wheeling in sand, mud, ice, and other nasty weather or surfaces where there is enough "give" in the road surface. It's full power at all speeds to both wheels.
Posi-track, or LSD, has a mechanism inside the differential like a clutch disc. When it slips it automatically locks the diff to put the power to both wheels. But it only does that if one wheel spins and the other does not spin at all. Once the other spins the clutch is released so the differential can function normally, letting the wheels spin at different speeds in corners.