It's measurable and quantifiable so I think it's very valid.
This is more from a scientific perspective:
Saying something is measurable and quantifiable is NOT the same as saying it functionally matters.
We can measurably quantify that person A is 1 mm taller than person B...doesn't mean that matters in any real world.
Just to add more color to the story: I've been running SLI since 2010 when people were screaming its broken, unplayable, and way to inconsistent. However, I've had a great experience the whole way thus far.