I don't have a dog in the fight, because I shoot 6.5 Creedmoor, 308, and 300 Win Mag, but I don't trust those numbers. The Ballistic Calculators I use show the 6.5 Cr 120 Grain Hornady load in a 26 inch barrel carrying ~540 Foot LBS at 1000 yards. 190 Grain Fed 300 WM is about 1000 foot pounds, and 308 in 175 SMK is about 575 foot pounds. I have validated the trajectories and POI vs the programs with real results, so I think they are right on. I have not validated a 168 grain load in 308, but it can't be hitting twice as hard as the 175 load.
I like the Creedmoor alot. If you are target shooting, it's tough to beat. But I don't think you can argue it is superior to 308 in terms of "power" at 1000 yards. It is certainly not the match of the 300 Win Mag (I know you didn't say that, someone else did) at that range, or really any other.
For target though, IMO the only real knock on 6.5 vs a 308 is barrel life..which probably doesn't matter to most of us here.
I think TMF is right. I would only argue that in my experience, 300 yards seems to be a better test than 100...though wind comes much more into play at 300. There is some ballistic funkiness that occurs at short ranges sometimes that get worked out around 300 yards. I have a Sendero in 300 Win Mag that shoots 1 inch groups at 100, which is kind of shitty...but it shoots 2 inch groups at 300, which is much better. I have known other shooters that have experienced the same thing. It doesn't make sense to me...but it seems to happen. I was ready to throw my Sendero in the trash until I started shooting at 600 yards.