Not especially. Maybe, maybe not. I dug up this post that I had made with spine results from a while ago. This was for a dozen of Easton Epic C2's and a dozen of ACC's. I didn't record the straightness specs, but I think they were within what Easton had stated:

My friend wanted to stick with all-carbon arrows and bought a dozen of the Easton C2 Carbon Epic 400's. I prefer ACC's and bought a dozen of the 3-49's for this upcoming elk and deer season.

First the C2's. They advertise +/-2.0grains across a dozen. Following weights are RAW shafts with NO nocks in them.

Spine: Weight:
.402 262.0
.401 261.8
.408 258.6
.390 259.6
.407 258.6
.396 259.5
.388 260.7
.397 260.1
.388 261.2
.390 260.1
.403 261.2
.400 262.7

Spine span of .020" and a weight span of 4.1grains. One shaft had a noticeable spine wobble of over .007" as it was turned with the weight on it. That was the worst shaft, some better than others.

No onto my ACC's.

They advertise +/-0.5 grains across a dozen- Following weights are shafts with ACC nockbushings installed from the factory.

Spine: Weight:
.375 291.0
.374 291.4
.373 290.9
.376 291.1
.373 291.1
.371 291.6
.373 291.6
.371 291.8
.374 291.2
.375 290.9
.372 291.5
.376 291.0

Spine span of .005" (pretty nice!) and a weight span of 0.9 grains. This kind of shows why the ACC's are consistently such an accurate arrow. I did notice one shaft had awobble of almost .005" in spine as I rotated it on the tester. That shaft is getting weeded out immediately....

So you can see that both sets of shafts were decent as far as "straightness" specs, but which do you think will yield more consistent fixed-blade BH flight?

I've always liked ACC's. They are a damn good, consistentarrow.

I haven't played with the new gen of Easton's alum/carbon hunting arrows so I can't comment on them yet.