IMO, most people overestimate themselves.
Those at the sharp end of raiding will probably be able to make use of those few milliseconds.

For the rest of us scrubs, saving a few milliseconds here and there isn't going to make much of a difference. Whatever milliseconds you think you saved, you just lost the next time you needed to run/avoid something, or the boss becomes invulnerable.

Use whatever makes you comfortable.
That comfort is what raises your DPS output.