CAK has been buffed recently so I'm guessing they forgot to change the power description to match it.
These descriptions tend to be vague at best and ultimately pointless in many comparisons, best to just take a look at the power real numbers.
Yes, never, ever trust those qualitative descriptions. While it is also sometimes wrong, the data in the detailed power info is far, far more likely to be correct. The "plain English" versions are manually entered, and have been subject to omissions and just plain wrong information since the game was first released.
Blue
American Steele: 50 BS/Inv
Nightfall: 50 DDD
Sable Slayer: 50 DM/Rgn
Fortune's Shadow: 50 Dark/Psi
WinterStrike: 47 Ice/Dev
Quantum Well: 43 Inv/EM
Twilit Destiny: 43 MA/DA
Red
Shadowslip: 50 DDC
Final Rest: 50 MA/Rgn
Abyssal Frost: 50 Ice/Dark
Golden Ember: 50 SM/FA
I think it's Spirit Shark that still apparently deals 'Heavy' damage, which was never even one of the quantities of the original damage scales afaik.
Dusty Trophies
What's with the description for Crippling Axe Kick? It says it is Moderate Damage(Smashing)? Crane Kick and Cobra strike say they are High Damage(Smashing). Doesn't it sound like CAK is less damage than either of the others? It's the reason I opted out of it in my last respec after they changed cobra strike.
I did some digging around after reading some other attack chain posts for MA on the forums. I couldn't find much help on Mids in this regard about actual damage values...so I respec'd and took those powers, and slotted them all with ToD sets. CAK does about 10 more damage with identical slotting. Seems like the description should be changed, or something.