I have the Savage 10 BAS in 308. The first 20 out of the barrel were .173 on centers. So the proof is in the pudding.
The only concern My friends and I have had about the 6.5 Creedmoor is the continued availability of quality brass. Hornady is capable of making good brass but will they do so? The 260 was just barely OK with just about any brass you used, where the 243, like 308, the good brass is only another component in the chain that makes good ammunition.
On magazines; Savage chose to use a proven Mag, the Accuracy International type which I have 3 different brands of. For a 10 round version you can pay slightly less than $50 to above $110, They all seem to work very well, although some of the generic ones are a little cramped on the inside by .010 to .017 shorter than AI Brand. I have four 5-round AI's that seem to be indestructible and remain flawless!
I glanced over the American Rifleman article but haven't bothered to read it. They seem to fall in love with every gun that crosses their desk, and have written the praises of rifles that wouldn't hit a barn from inside it. However I have seen similar tube (or Tubb) rifles shoot very well, and believe it to be a proven concept. They even seem to shoot well in other colors than black!
As long as Ruger keeps the assembly rate at a level that allows consistency and quality ammunition and components are available, this should be a good rifle!
Ivan