Well I've used the VIVO on my Ti 4600 and it just depends on the program you use to
view the signal being inputed...as long as you dont enable any sort of "caching/buffer"
option there wont be any lag from controller input to what you see in the game.
(Now that I dont have an SVIDEO input on my monitor I should use the vivo port, but I
packed away my dongle cable )