I am still calling bullshit on the 3%. There is just no way to quantify the different dimensions of flex that way. It makes no sense.
How about if they have a machine which flexes the highback with a constant pressure until it snaps? You can then compare highback stiffness.
and yeah, there is 3% more torsional flex this year.
I know, I know, 3% sounds silly but seriously, if I was making it up, don't you think I'd use a bigger number?